Heres mine
1. Self printed letter, signed etc.
2. Handwritten SAE or SASE (My labels are beginning to run out)
3. 9x12 photo if sending V.V or other occasions (rarely)
4. IRC's (very rarely)
5. 9x12 ordinary piece of paper as my ink is running low and the autograph means more to me

(I will begin to do this as of September 2006)