chicagohh - 9:37 pm on Mar 7, 2011 (gmt 0)
I would caution to not outright discount someone that wants to just "see how things go". Get a check up front or only do 1 week worth of work in advance. The point being to lessen your exposure.
My best client has been with me for over 5 years. We don't have a contract and I strongly suspect that had I asked for one in the beginning he would have walked away.