Call me teacher
This week I gave a two-day course for system administrators, on how our system works, and things they need to know to be able to administrate it in deployment. A few weeks ago, doing something like this would have been far outside my comfort zone, but the only way to grow is to step outside it and challenge yourself… So this time it went a lot easier, and I quite enjoyed it, although it is very exhausting.
At work you can always take a break and surf the web for a few minutes, but when giving a course you always have to be on, so to speak. Something that can relieve this, is if you give the course participants assignments to do - then you can sit back and relax a bit, but only until they need your help, of course. ;)
If you want to work on your non-technical skills, then I can recommend giving a course or speaking in front of crowds in general. Challenging, and quite different from the standard work routine.