Original post by D8238Like I've mentioned before, I'm not a PT nor a nutritionist, so my advice is actually pretty poor on this issue.
However I have had personal experience with this, and a few things have helped me:
1. Drink water. Lots of it, before you eat and then wait 10-30mins for it to settle.
2. Eat slowwwwwly. Really concentrate on your food and savour it, you will get fuller quicker.
3. Eat more slow-releasing calories at lunch, not just simple carbs, so that you still have some left after you workout.
4 (and most important). Don't beat yourself up about what you eat. It's okay! We're not perfect. One big meal won't derail you, so don't suddenly portion control everything. Start slow. Plan your meals in advance and limit yourself to that. Have fruit after if you're still hungry, or my personal fave, banana ice cream [very ripe bananas, broken into small chunks and frozen. Then whizzed up in a food processor with some PB or frozen raspberries.] It makes a guilt free dessert!