Comedy is all about walking the fine line between funny and unacceptable. You want to push the limits, but be careful not to overstep your bounds. In case your comedic compass is a bit broken, here's some examples that are NOT okay to joke about:
-That picture of Keanu Reeves sitting on a bench looking sad
-The War of 1812 (too soon)
-The inexcusable cancelation of Firefly
-Any of the things I am sensitive about (I will not disclose this information. I expect you to just know.)