I am working security gig about 14-16hr/week on weeknights. I took the job , because it only requires only 2-3hr of walk (20-30min walk per round), and it is giving me all the exercise I need with all the heavy belt (extra weight) on it.
I can add or subtract hours based on my physical condition. (Recovering from severe Arthritis I suffered for 16mo).
My physician approved it too, and he said I am losing about 4lbs avg per visit. I need to lose about 40-50lbs just get back to where I was before suffering from arthritis.

It sure beats joining the gym!

Here are my thoughts. Part time:
-Pizza delivery. College towns are better. Lower tip, but higher volume.
-Securityguard. Easy sit down type. Do not go for ones $16.50+, they work you to death.
-Janitors. However, need to work on a good contract ones. SOme are extremely difficult.
-Work at retail part time. - Working at Dick's 2007-2009 part time was awesome. I learned a lot about golf equipment and custom fitting. I think I worked all depts, except casher. I was basically floater.