For light stuff like pictures use regular Command Strips. For heavier use the Command Velcro Strips. I even used them to hold two spice racks to a wall, and with spice containers haven't failed yet. Won't damage walls, wall paper, vinyl, wood.
Steve & Cheryl + Zoey, and Ziggy, our furry kids.
2012 Forrest River Lexington 283ts
Toad, 2013 Subaru XV Crosstrek