I started losing weight but recently have been slipping, how do I get get myself going again?

I am a 5'8 guy and weighed 250 lbs. I saw a friend who used to weigh more than me lose alot of weight and because of that got myself motivated. Eventually I dropped 30 lbs in two and half months by lowering my calories and working out more often (the good old fashion way). However, recently I find myself slipping into old eating habits (not as terrible as I used be when I would carelessly eat anything, but I still feel guilty about it) an noticed an overall lack of motivation. I'm worried that I may slip back into my old habits and stop being active and eat whatever I want. This change also happened around the same time I hit a plateau - when doing as much work as I used to do yielded little to no noticeable change. I also find myself focusing more on doing weight training in the gym rather than cardio (weight training is a lot more fun to do than cardio). I was also wondering if I should change up my gym routine to focus back on more cardio and less on weight training.
Answer:
Actually, weight training (believe it or not) is more effective than cardio. This is because weight training increases your muscle mass which will burn extra calories 24 hours per day. Cardio is good but it does not have this residual fat burning effect. In addition, running a mile at your weight burns less than 130 calories. That is only about a tablespoon full of oil.Keep lifting weights.One trick which works with nutrition is to get rid of all of the junk food in your house today and only buy healthy foods. If you want an occasional treat, then go out for the treat. It is harder to eat junk if it is not readily available.Here is a healthy foods list:
http://www.spartafit.com/nutrition/prefe...

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