I continued to "get dressed for work" each day, then would change out of a shirt at the end of the workday which helped more than I thought it would. I'm lucky enough to have a dedicated home office so also stopped doing anything resembling leisure (even technical reading) in my office after hours.

Taking the dog a long walk after work each day showed promise, but it wasn't as effective as I'd hoped. I ended up just thinking/talking about work the entire time.

Thankfully, most things have re-opened here (Scotland) now so I'm able to resume all those hobbies that were sorely missed.