I'm getting very hungry at the moment after doing a lot of running over the last few months.
So, when I get hungry I find that a piece of fruit (tangerines or bananas at the moment) seems to help. It seems to provide the energy I need but will eating too much of it (ie whenever I'm hungry, which kicks in at lunch and lasts the rest of the day!) make me fat? I can't think of any healthier ways of getting the energy in.