Also, after completing daily responsibilities your sim will get a 'job well done' buff.
You can cast some spells on yourself, like flare, clairvoyance, and, if you have it, beacon of hope
Gussy up in the mirror before you go
Research for an hour gives you a nice buff too
If you have the physician, just next door to your wizard, get first aid is a fast interaction for a quick buff (can't remember if it's long lasting enough though)
Collect herbs and minerals just before you go into the forest for a buff on both of those aswell.