Living off the meal plan

Given the recent activity of the subreddit, it seemed like a reasonable time to post something like this. I'm a rising Junior, and what with the tuition increase (and general dislike of even more debt), I'm probably skipping out on the whole Sodexo experience this year/next.

Since there are doubtlessly (hopefully?) others in a similar boat, does anyone have any suggestions/tips/hints/experience for food? Farmer's Market stalls to track down or stay away from, best reasonably costed places to find decent groceries, shit like that.

Edit: Thanks for all the responses :) (srsly y'all are awesome)