Over time more and more corners of a house seem to get put to good use. And that is highly individual. It is a process that creates a certain type of alive beauty. Ever since I read Christopher Alexander's A Pattern Language do I notice this everywhere. Here is a quick Google result that gives the key points: https://www.buildingbeauty.org/
I've successfully used Command Strips (basically plastic hooks attached by tape), though they have limited weight maximums so I wouldn't use them for something like a bike. They'd be great for face masks or most of the other examples that Jeff listed.
Some landlords ask that you don't use them though, and I've occasionally had them rip off paint if I'm not careful when removing them.
The entryway had gotten pretty messy, with a lot of things scattered on the horizontal surfaces. We decided to put up some hooks, to move things onto the vertical services. I used some trim that I'd saved from an earlier project, cut it to width, screwed it into studs, and attached hooks:
This also included a pair of clothespins on wall anchors for the parking permits.
Each skateboard is on a pair of standard coat hooks, 4" apart. Each pair is 6" from the next. At some point if we want to hang some thing else there, the hooks are general purpose.
We also have two bike hooks on the wall. I put them in about four years ago, and they've worked well: