Different ways to solve a 3x3 (other than different methods)

There are lots of methods for solving a 3x3. But if you want to shake things up while sticking with your favorite method, what are some ways to do that?

(Preferably things you might actually do now and then, rather than things like solving while hang gliding into a volcano.)

For example:

- One handed
- Feet
- Full color neutrality
- Unlimited inspection (or no inspection)
- Like a void cube, then swapping centers
- While looking into a mirror
- Inspection, make some moves blind, repeat
- With a metronome
- While juggling
- While running/biking/unicycling