I need a healthy eating plan

I decided that the right time has come and my life needs some lifting, some upgrading. I want to change something in my daily routine because if it keeps going like that, I am bound to fail, to be doomed. What I dislike the most about my present way of living is the fact that I am basically leading a couch potato lifestyle. Most of the time I am spending in front of TV or in front of the computer screen. While I go out to train at the local gym once a week, I know that it is not sufficient for me to become more healthy. If this was not enough, I am also eating a lot of junk food. I want to cut on eating this junk and I want to have a healthy eating plan because if I had one, I would probably eat better. I mean, I know that some people even though they have healthy eating plan tend to go back to their roots and still eat junk food. I think that I would have enough power of will to survive my brains onslaught. You know... . Whenever you change something in your life, your brain wants you to go back to the previous taught concept and it starts a real onslaught. I had this plenty of times whenever I wanted to implement a healthy eating plan before. I tried this several times but all of those plans were rather corny and weak. I need something serious now because I feel that the time has come! I will manage to do it!