First and most important. You should not talk about losing weight; talk about losing fat and gaining muscle, first you try to lose a load of fat, and some weight with that, than you want to transform your last bit of overdo fat into some muscles which are heavyer than fat!
Join a gym where they have those awesome fat meter equipment.. or just walk in for a free tryout, and do this every now and than at different gyms ( if its to expensive) they can give some great advice on this by the way.. most of them went to school for this… you should really be asking their advice but these are some rules i found on the web, and seem quite logical to me..
couple of simple ground rules;
1. Eat breakfast each day, skipping meals can cause you to gain weight.
2. Control your portion sizes
3. Make every meal look like a rainbow (no skittles :P) means ashitloadd of variety, apples, tomatoes, chicken salad,yogurtt go wild!
4. Choose foods and beverages low in sugar and fat
5. Exercise 5 times a week for a minimum of 30 minutes working up to 60 minutes on most days of the week
especially if you want to gain muscle tissue,don’t be surprised if you gain some weight.. muscle is heavyer than fat! perhaps for the motivation it is best to start off with cardio and condition training, running,cycling, rope jumping break a sweat, after that build up muscle.. just keep eating in a healthy way.. use your brains to decide what food you ll eat, its all quite logical…
oh and maybe find a friend who will join you at the gym, or running every evening.. this makes it easyer to keep doing it..
Biggest issue is not all the plans and systems and stepbystep-crap, its just plain doing it.. people need all these systems because they hope that once its on paper theyll actually do it.. you dont need to count every carb you eat. Aslong as you have a fully functional brain you can figure out what is healthy, and how much to run.. just build it up a bit .. and take it further and further each day..
but hey.. i did not study this.. ask someone at the gym or some healthdoctor or something.. may be a more waterproof plan…