Theres lots of ways to hold your minis while painting, the articles section has allot of easy effective solutions. I myself use corks shoved in the top of a pill bottle for the bulk of my stuff, tho for heavier minis I use a pill bottle with a screw on cap drill two lil holes in the top and double pin the mini put the pins in the holes the cap and give a half a twist. Also blue tac, super glue, I'll hold one designated part of the mini and paint it last, pin vice, pliers with the hand grip rubber banded shut, really whatever works for ya theres tons of ways.
Always remember the articles, forums and
The Sticky Thread (thanks Avelorn it's a great resource).