In several places it's hard to tell how much energy you need for something. The one that trips me up most often is grinding and smelting -- there's no indication at all (that I can find) of how much energy per unit it costs and how much energy I'm going to consume in total. I just have to try it and see what happens, which could leave me in bad trouble. The recipe interface shows how much energy per unit (I think) but not how much energy making N items is going to cost, so I have to do the math in my head, which is awkward.
Relatedly, it would be nice if the item descriptions for edibles included how much energy and/or mood they gave you.