One of the best things I'm recognizing is my hunger. I think the last time I was really, truly hungry was probably when I was a baby. Everything since then has been mostly mindless eating, such as eating on a schedule or eating for boredom. I wasn't eating because my body wanted food, I was eating because my mind did.
Feeling hungry is a pretty amazing feeling, actually. It means that I am working my body enough to use up all the fuel I am giving it, and in order to keep going, I need to refuel. I know "intuitive eating" is a debatable topic, but for me, it works. It's easy to oversimplify it, but essentially, if I'm hungry I eat. The trick is deciding if I'm really hungry, or if I'm thirsty or bored.
One of the biggest changes for me has been my snacking habits. In the past, I would consume huge quantities of snack foods, not because I was hungry, but because I was bored, or because I was watching a movie, or because any other reason I could easily justify for eating high calorie and high fat "snacks." Dinners have also changed for me. I grew up in a household where every night we had some variation on the basic theme of a meat, a starch, and a vegetable. I'm trying to get away from that now, at least in a general sense. I'm trying to eat balanced meals, but not necessarily the ones I grew up with. For example, I will chunk up a grilled chicken breast, make some plain rice, take a scoop of fat-free refried black beans, mix it all up with some chili garlic sauce, and eat it wrapped up in lettuce leaves. I'm still getting the nutritional balance without having childhood flashbacks of a piece of steak covered in A-1, a baked potato drenched in butter and sour cream, and some broccoli I ignored.

Now, I have a cup of yogurt for breakfast, a Lean Cuisine or Weight Watcher frozen meal for lunch, and plenty of water throughout the day. I pack a 100-120 calorie snack to bring to work since I feel hungry after I finish teaching at 3. When I get home around 5:30 or quarter to 6, I start to feel hungry again, and since I go for my nightly walk right after I drop my things off at home, I grab a piece of fruit. Then, when I get home, I wash up, change, check my e-mail, and start to feel hungry again, so I make dinner. After dinner I work on the Wii Fit, then draft my blog entry for the next day, answer any e-mails from students, and try to read and comment on a few blogs. If I feel hungry at all after dinner, I have light snacks around - baby carrots, hard-boiled eggs (egg whites only!), prunes, etc. I think prunes get a bad rep - they're delicious and they totally satisfy my sweet craving for only a few calories!
So basically, I'm still eating my three basic meals, and I'm still snacking throughout the day, but I think the main difference is the counterpart to feeling hunger - recognizing fullness. I have two or three egg whites, or maybe four or five prunes, or a banana, and the hunger subsides. I'm trying to improve not only quality, but quantity.