Focus upon becoming FIT instead of becoming THIN
My experience has been that after I discovered the joy of a really good workout and made that my priority, my food selections became much healthier. I began to eat to improve the quality of my workouts. Together these allowed me to become slimmer.
I also want to add the importance of strength training. I think sometimes that is overlooked as well. In my case, I could do cardio like it was nobody's business but it was the weight training that really made a difference in how my shape has changed.
Like many of you, I used to eat something unhealthy and then think "well I've screwed it up now so I might as well just give up." But eventually I realized that whenever that happened, the fact was that eventually I was gonna have to get back on the weight loss wagon. Be it that day, be it a year from then, whatever... since I could never give up the dream completely, I was always gonna eventually make another effort to lose weight. So now, when I eat something off my plan I just think "you're gonna have to get back on the wagon eventually so you might as well just do it now!"
These are fantastic. Thank you!
I think my advice would be to find what works for you; we're all different, and we all lose weight our own way. That might mean a total lifestyle makeover or a series of little changes. Try something, and if it doesn't work for you try something else! You'll figure out what works best for you.
Lifestyle Change
Diets (an eating plan you go on to lose weight & go off after you've lost what you want to lose) do NOT work! If you want to be successful, your eating plan MUST be a total lifestyle change.