This is something I have always had a difficult time with!
The hardest things for me are SAYING NO (because I'm a helper and I like to go above and beyond)
&
HAVING A BALANCE between work and personal to do lists. I always do too much "work" at once.
Sometimes I worry that I LOVE my job a little too much. I stay late EVERY DAY... just about. I put in extra activities and lessons for my co-workers. I share resources constantly and sometimes make them from scratch. I enjoy helping my colleagues, putting in extra effort for students, and organizing my materials... But I need to learn when to STOP and understand that everything DOESN'T HAVE TO BE PERFECT!