First and foremost, I'd encourage you to get really honest about your current physical condition. Strip down and take a good look at yourself in the mirror. Are you too skinny and need to put on some mass? Are you too fat and need to spend some time getting leaner? Think about this seriously and be brutal in your self-evaluation.
The next think to do is to start getting prepared exercise in order to make your transformation. This may mean dusting off the old barbells, dumbbells, or treadmill that's down in your basement. Better still would be to join a local gym. There's nothing wrong with home or garage gyms, but there are a few advantages to being a member of a professional gym. You'll probably have extra motivation to train since you have spent the money on the membership. You'll also enjoy the comradely of working out with other like-minded people. Another big advantage of a commercial gym is the vast array of equipment that is available. Unless you are filthy rich there's just no way that you can afford to have millions of dollars worth of training in your own home.
It's also important that you start making the necessary preparations for a new eating plan. Go through your kitchen and look for foods that you know will sabotage your goals. Get rid of highly processed and sugary items. Ditch the soft drinks and all sugary drinks. Anything that is high in calories and sodium should be thrown out. You'll need to replace all these with nutrient-dense, high-protein choices. Remember that you must take control of your own kitchen.
One more thing you may want to consider is supplements. You don't really need to spend a lot of money--just stick to a few basic items like protein (whey powder), creatine monohydrate (micronized is preferrable), and some type of multivitamin (and brand is fine). Fish oil is also useful. But these are about all that you really need so don't spend all your money at the vitamin/supplement store.
Now it's time to get serious about a real workout plan. One way to do this, of course, is to hire a personal trainer. That will get you results, but it's kind of an expensive option. What I would recommend is that you consider investing in the Adonis Golden Ratio system. This complete guide from John Barban is a customizable diet and training program that will help you decide what you should be doing to make your body more attractive. Guys that need to lose fat will be directed to reduce their caloric intake and focus on styles of training that burn fat. Guys that need to gain weight will be eating more calories and carbohydrates. Whatever your goal, I'm confident this program can help you get there.
The final thing to remember is that you have to be patient and dedicated. Body transformation does not occur overnight, so you need to be prepared to spend at least a few months of focused training and disciplined eating. Remember that there are no real shortcuts when it comes to getting the physique that you've always wanted.
