I'm in this with CaliBoy.
3 years ago I was nearly 200 lbs with little to back it up. I started to hit the gym everyday, I WANTED to change, and over the next few months I dropped the weight. Since I've had trouble in 2 areas: 1) putting on size, and 2) cutting... I really wanted that six pack.
Here's what I've learned.
Pound away at the gym all you want. Diet is the most important part in changing the way your body looks.
1) Putting on Size - When I noticed I had plateaued, I would eat more protein.. A LOT more. More steak, more protein shakes, more whole milk after my workouts. Eventually I started putting on the kind of muscle that I had been looking for, but still I was lacking the kind of definition I always wanted. I'm still not as big as I would like to be, but now I know HOW HARD I have to push my limits. LOOKING THIS WAY IS NOT EASY... if it was, everyone would look that way.
2) Cutting - You want to cut? Well first you need to build ample muscle to help burn off those extra calories. For every pound of muscle you add to your frame you burn 50 calories a day in a resting state - i.e. if you add 5 lbs of muscle, you burn 250 calories more a day just by existing.. that's about as many calories as in a low-carb protein shake.
So, let's say you've hit the gym consistently and started to develop some muscle. If you really want to cut, to look like a supermodel, A LOW CARB diet is key. You still need carbs to fuel your workouts, but on this type of cycle you should only be eating a bowl of oatmeal in the mornings, and complex carbs (e.g. whole grains, quinoa, etc.) after your workouts WITH PROTEIN. And don't discount the importance of healthy fats. Avoid most fruits as they are packed with sugar as well, though some blueberries in your oatmeal or in a protein shake are great for energy and are ripe with antioxidants.
This is not to say that a well balanced gym routing isn't important as well, but, I've been getting my diet tips from a fitness model friend whom just placed in the Miss Olympia competition. She puts it like this... "You call it a diet, I call it not being fat" And since I've applied everything she's told me... well if you'd like to check out my pictures they speak for themselves... all my shirtless pics were taken within the past 2 weeks.
Sorry about the rant, but my point being... it's never too late. CaliBoy said it right: Take ONE YEAR out of your life to make the change you want.