I count calories in the opposite direction. I usually buy the things that are more calorie dense. Like I usually buy clif bar and related clif products because they pack a lot of calories per bite with a relatively good effect on my blood sugar.

I've started eating extra pb&j's at school/work to make it through the day. I struggle to eat enough good food because of my demanding days and low student income. It can be difficult to pack 500+ calories of snacks to make it through a long afternoon. Do other people have this problem?