Let me remind you that if you are under 70, collecting Social Security, and also working for wages (not merely collecting a pension) at the same time, there will be a clawback of your SS if your wage (or self-employment) income is over a certain amount. Here's the link (I hope): www.ssa.gov/pubs/10069.html.

The amount you can earn before the clawback starts is increasing, and by 2010 or so the limits may have gone away completely.