If you're making a big poster for a conference or slides for a talk, or if you want to make something at 4am, the following three places are reccomended. The biggest printer uses a roll of paper that is 6 feet wide, so they can make big, conference sized posters. N2 also prints smaller things, shirts, mouse pads, etc. They'll have your slides ready in about 3 hours, or first thing in the morning if you drop them off the night before. Glass mounts take 24 hours.
Many labs have accounts here.
They can print fairly big things, bind things like that candidacy report, and make overhead transparencies.