My friend sent me a link to this great Table of Condiments that Periodically Go Bad - which is pretty much like it sounds - a table listing out the shelf-life of different condiments. The site that posted the table found it in some "weird day planner from 1997" and they're not claiming the info to be fully accurate, but it looks like decent advice. If anything, I think most of these are underestimated (I'm pretty sure honey lasts longer than 8 months). Either way, it's pretty fun to check out.