Amy Hoy, a veteran in the maker community, is really interesting to check out. She really advices people to use email marketing. I think if you use it well and add value it can definitely be a great channel.

Awesome idea!

My recommendation for external things: Make a big overview of all the things you have to do (Big mindmap for example). This reduces uncertainty, which causes stress. Then prioritize the responsibilities. Make a plan of action, and execute! :-)

My recommendation for internal things: Take breaks, your mind needs rest. Ever needed a solution for something, went to sleep and woke up with the answer? Your brain is working when sleeping and resting. Get enough sleep. Eat good quality food. Drink enough water. Exercise 3 times a week.

Oh and once in a while treat yourself to a visit to a spa or a massage or something you will enjoy and relax you totally. Good luck!