One thing that I've done is to create hashtag serieses, where I try to make a bunch of posts about random topics. Here are the ones I've done so far:
#guitarsiwant - here's where I post random pictures of guitars/basses/amps/pedals/etc. that would be awesome/fun to have.
#dreamjobs - here's where I list "dream jobs" - jobs that would be awesome to have, but are entirely unrealistic.
#favoriteplaces - here's where I list some of my favorite places in the world. Each post is a link to that place on google maps, yay!
#30daysongchallenge - this one is where I'm posting a music video for a bunch of random different criteria. Go and listen to them!
yeah. that's it for now.