Just a bit curious as to what or if others do by way of solo drills. I work away a lot and it's rare to be working with someone who does any form of martial art so often drill things on my own.
The common one is transitioning through different mounts on a ball or bag.
Also I often get funny looks as I lie on my back, eyes closed imagining someone in my guard as I work through various techniques. It's not wonderfully effective but if nothing else it keeps techniques in my head and reinforces some muscle memory.

Just wondered what others do when they have no one to train with or a spare 5 minutes