If I stay with a friend while traveling, I'll print a photo from that trip as a thank you to them for letting me stay with them. I get to hand-deliver this one too, so I'm super excited!
Started being a concert photographer in my local music scene which means I get to also take pictures of my friends and call it work. Doing so has allowed me to appreciate my friends' beauty and their loving companionship.
Document your friends and the adventures you have together! Print them out and get nostalgic when you come across them a few months or years from now!
At the end of each year I select ~100 photos from the 2000+ I took that year, print them and put them in a box. When friends come over I give them the box to flick through while I make coffee/drinks/get a snack. It's a nice way of sharing the moments that mattered to you.