If you live near a major city tons of non-profits pick up around this season. I've actually looked into it this season, and have an interview set up for canvassing which is basically walking around city-centers and door to door, basically looking for donations. It's not my type of work because I dread using "rhetoric" or asking for money in general, but when times are tough, sometimes one has to make choices. They start fairly good pay ($10-12 per hour) for requiring no prior experience, and solid benefits for full-time employment. And, if you don't like interacting with people, you can even view it as a self development project (which is what I think I'll do if I end up doing this job).
Another easy summer job is life-guard (easy, cheap certification). Though the most lucrative jobs with minimal requirements seem to be labor, and it's easy to pick up knowledge and advance if you soak up all you can. Might be tough starting if you're out of shape, but I've known plenty of people who are far from athletes that are in construction, there's plenty of 'finesse' jobs once you pick up a skill in it.
The only hell for a warrior is peace.
The warm fuzzy side of the cold hard truth.