Absolutely. Preventing overeating was likely the biggest contributor to my weight loss. I stopped going back for seconds every time. The next biggest was probably eating higher quality foods, similar to your examples. My memory is fuzzy on this detail, but I believe the times I ended up hungry were largely the days on which I'd had an especially calorie dense meal, like pizza, earlier in the day, so my calorie allowance was smaller come dinner time. However, pizza being my favorite food, I'm unlikely to give it up. Rather, I try to make it the last meal of the day. I found that I was able to resist the late-night munchies easier than mid-day hunger pangs.
A few years back I lost 30 lbs over the course of a year using Lose It. I didn't make any major dietary changes other than reducing total caloric intake. I found that ballpark estimating calories for restaurant food was fairly easy and close enough. I never weighed my food. I even went over my caloric budget fairly often and would just make up for it the next day. Overall, it was surprisingly simple to lose the weight but I did find myself hungry more often than I would have liked. After regaining that weight over the last two years, I recently bought an exercise bike. I'm hoping that the regular exercise it provides will help suppress my appetite. I have been thinking about picking up Lose It again, and this thread has convinced me.