I hope it actually did help! I got a great swap journal from someone in a swap and then I recently made one. I had left mine at work and just used the one in the link to remember what to put in. I tend to carry mine around with me!
This always happens: I send, I spend half an hour after leaving the post office feeling like a responsible person, and then the anxiety sets in, along with the little voice that goes "And it's too late to add anything now."
Add something?! I always want something back cuz I'm sure it's total trash. Funny thing though, the PO does not want to give you back your packages, even though they are YOURS!
I always have a tape measure, sometimes scraps of material to match (just in case), a stray marker or two, JoAnn coupons (do those count?), sometimes super glue, whatever latest giftie I've gotten in a swap for showing off!