I once tried to write a novel...........I got totally naked for inspiration to write a comedy....I gave up almost instantly as my mother in law and wife walked into the house and saw me sitting in my leather chair naked and covered in sweat.
Maybe they wrote a comedy with you as the main character; you were someone else's inspiration
On a more serious note, I myself don't write humor (yet) but I find elements that lend themselves towards humor are frequently:
-Stories from your life (can be injected into fiction
instead of told in reference to your life)
-Unique perspectives on something people would consider normal
-Either being extremely direct, extremely muddled/random, or extremely sarcastic
-Youtube videos. Yes. Watch Youtube Videos.
Humor is subjective to each individual person and that is what makes it so hard. Do what you find funny and NOT what you think other people find funny. If you try your hand at something you don't laugh at, no one else will. However if you appeal to your own sense of humor, remember there are always others out there with the same sense of humor as you.