Some good advice there in regards to diversifying your efforts and not getting to hyper-focused on one area. I have a bit of OCD so I can tend to do that and sometimes it can be useful or helpful to hyper-focus, though it can surely end in burnout and feeling overextended.
I also like the emphasis on having fun, I think that's a good point! If we take things too seriously it can certainly have unpleasant results. Those are some good reminders for me! Spread my time out a bit to different things and remember to have fun. :)