Neat little calculator I found just swimming around the net.
You can figure out how much your time is worth to you. Here's mine:
In a typical week, you have about 23.65 hours of leisure time. Each of those hours is purchased, in effect, with 2.48 hours of work time or $37.07. You work an average of 58.65 hours per week, for which you get paid a net $14.95 per hour after expenses.