Welcome!  It's GREAT that you have decided to do something now instead of
waiting until you are older.

9 holes of golf every day is good, but it's really low intensity even if
you're carrying your clubs and not using a cart.  I don't think the course
would care for you sprinting between holes - though my father-in-law and I
did that one night last summer trying to get in as many holes as possible
before the sun set and it was a blast :)  If I were blessed enough to be
able to golf 9 holes a day, I'd still have to run or do something of higher
intensity a few times a week.  I'm not suggesting you run, but even a brisk
walk is good.

I work out a minimum of an hour a day varying the intensity.  If the
treadmill has an incline, crank 'er up and walk uphill.  When the weather is
nice, I'd be outside though because we have to be indoors so much in the
winter.  Check out http://www.stumptuous.com/weights.html for exercise info
(and nutrition) - it's geared toward women but helpful to men too.  Also
there's http://www.exrx.net/Lists/Directory.html to give you lot of
different exercises for each muscle group.  You can probably find all kinds
of things to do on your total gym, plus other exercises to round out your
routine.

There you have it!  You learned already that you need to find a way of
eating that you can live with indefinitely.

Lots of good foods out there but keep in mind you can gain weight on good
food too if you don't learn portion sizes.  Go for things in their most
whole or natural form whenever possible. Keep the refined and processed
stuff to a minimum - that's the white flour, rice, sugar.  Avoid fried foods
if possible since frying multiplies the calorie values by 2-4x.  Vegetables
are good for fiber and vitamins and there are so many out there that you
will probably find something you don't mind eating if you're willing to
experiment.  Do you like to cook?  Oh BTW, eat breakfast!

Learn about food and nutrition by reading.  Keep a log of your food either
in a notebook or on the computer.  A lot of people here use www.fitday.com
and I use DietPower.  Spreadsheets also work.  Ask a lot of questions and
try to find ways to deal with emotions (including boredom) that don't
involve eating. Good luck and please continue to post and read.

Hope this helps.

Jenn

I would definately start adding some time to using your home gym. Your
golf is giving you some good exercise you need. But may I suggest using
your treadmill in addition to golf. That way you will get a more
consistant workout for a givin time. I would say dedicate anywhere from
30-60 minutes 6 days a week. Maybe 3 days cardio and 3 days strength
training rotating days and taking one day off. And maybe every other week
take 2 days off in a row. Jazz it up a bit each week. For cardio week one
do some quick paced walking for cardio if you can handle it. Then when
you get your endurance up maybe add some hiking in for cardio every other
week if possible.

I'm sure everyone will give you different food suggestions. Here are
some of mine

Fish---turkey---chicken
all veggies
all fruits ---preferably low on the glycemic index
nuts--for good fats
Cottage cheese,yogurt
beans---pinto,lima,garbonza,kidney
whole grain hot cereals

stay away from sugar,flour products..
If you must have potatoes,rice, and breads just do as I do and eat very
very small amounts not very often. Go for whole grain not white..
Switch white potatoe for sweet potatoe..

Here is some recipes that are good.

Make oven baked french fries made from sweet potatoe! very good.

Take cauliflower--boil it until mushy. Add a serving of fat free
creamcheese (30 calories) with some garlic and italian spices and mash
them all together.Its kinda like mashed potatoes only with cauliflower..
very good 7oz of cauli and a serving of cream cheese is only around
75cals. ANd makes a BIG serving.

Use portabella mushrooms as buns for a turkey burger instead of
bread.Yummmmmmmm Just throw them on the grill for a few minutes to get
them brown. Throw on some alfalfa or bean sprouts with tomatoe and  
mustard.. Makes great chicken buns as well.

Fresh fish and a can of lemon-pepper spice are you friend when put on a
grill.

Eat breakfast and you won't want that after-school snack.

Eat dinner earlier otherwise what you eat has no chance of
getting burned off.

1.7 miles a day is great but it should not be stopping and
starting like in golf where you have to stop to line up the
shot, then wait for your partner, etc.  You should try to
get to the course early and take a half hour walk before you play.  

As many people have posted here, liking veggies is usually
a function of 1) not knowing how to select them; 2) not
knowing how to cook them; or 3) not being used to them.

Start with frozen veggies which are packed right at the farm
right at the peak of ripeness.  Put about half an ounce of
water in a small saucepan, get it boiling, then put in a
handful of veggies.  Cook for ten minutes, dress with lemon
pepper or pepper or paprika or onion powder or garlic powder or
even a dash of cayenne.  Make sure to try every variety they have.

Next move to fresh spinach.  Cook some frozen french fries in
the oven. Start a tablespoon of oil heating.  If your grocery
carries India/Pakistani food, they may carry black mustard
seed; my Giant does.  Put a little of this in the pan and when
they turn gray and start to pop, put in a big handfull of rinsed
spinach after taking off the stems. Sprinkle with turmeric, cumin,
and a dash of cayenne.  Put in a splash of water.  Put the lid on the
pan.  After about 10 minutes, put in the french fries and some
"garam masala" which your grocery may carry even if they don't
carry the black mustard. Put the lid back on, turn the heat to
warm, and wait about five minutes.  

Minestrone: beef broth, green beans, onions, garlic, turnip,
basil, canned white beans, and about five minutes before serving,
slice in some zucchini.  Zucchini cooks fast so don't add it
until the end or when you reheat the soup.

I have lots of ways of sneaking veggies into food, like putting
baby green peas in my macaroni and cheese.  Just ask.

I think it's great, that at 17 you've made the decision to have a
healthy lifestyle.

First, I think breakfast is the most important meal (you'll have to
decide if you are a protein person or a carb person.  I can only eat
protein for breakfast, as carbs seem to keep me hungry all day.)  I
think in terms of a car, you can't expect your car to run without fuel,
your body will not either.  I've also noticed when I eat 3 healthy meals
a day, with small snacks (low cal.) between, that I seem to lose more
weight.  It's when I don't eat, that I seem to gain weight that I don't
need nor want.  Drinking water also helps to flush your body of toxins.
 Drinks plenty of it.  This does not mean, soda or juices.

You might want to choose you meals well, at school, or bring your own
lunch.  I know what they serve, is not always low fat, or very healthy
for someone wanting to lose weight.

There is a good 10 week walking program that I found at,
http://walking.about.com/library/day/blday51.htm
this is a free program and seems to address many concerns regarding
walking and healthy lifestyles.

Good luck to you!  BTW, I'm proud of you for this commitment!