During any campaign, I seem to find myself needing a new symbol and suddenly being at a loss. Under fire, I'm not that great at being artistic. In fact, I'm pretty bad. Instead, I decided to start filing symbols away as I came across interesting new ideas. Because I can't be sure what size or color I'll want for those symbols, I developed them in PowerPoint since it is vector-enough to accommodate any of my needs.
Check it out. Most are easily editable or customizable. I'll add more as they are developed.