A few things I do I will always find funny (at least when it comes to entertaining myself):
1) Saying “and you’re boring” when my kids say “I’m bored”.
2) Saying “Aw man, I’m sorry to see someone wrote all over it” when someone shows me autographed memorabilia.
3) Saying “Wow, your camera takes great pictures” when my professional photographer friends show me something they shot.
Like I said, I find them funny.