You are basically there to approve stuff, like the budget. Only if there's something really stupid it's your job to say no, but that rarely happens. If it's a smaller org you also do some job, like making policies, organize, etc. The smaller the org the more job you will do (and the less you will be paid). Being on the board of a small org like non profit is not very prestigious so it's easy to get in. But it can be a good learning experience. You first have to figure out who is responsible for recruiting new board members, then you have to get someone to suggest you. They don't want someone who actually want's to be a board member.
