I’m surprised how few answers actually include actually practical and helpful tools such as a bathing brush with a good long grip to reach just about everywhere. Is this a cultural thing? I swear I’ve seen them in British tv series at the very least, so I know for sure these are a common thing at least in the Nordics and the UK.
But I mean it’s the best. Really gets the old dead skin cells and other stuff off, and the blood flowing. The bristles are a bit rough, but that just makes it that much more pleasurable, you really feel it!
Edit:

These things, surely they are mostly everywhere?