Paul Thomas has some good suggestions for teachers, on how to do things that make a difference, without being a martyr and burning out. For example:
“Take stock of how much of your professional and personal energy is being spent on being a professional and how much is drained by being a martyr—and then stop being a martyr. […]
“Every teacher must take stock of her/his professional practices, and eliminate those that are time and energy draining with little to no positive instructional outcomes. For example, marking extensively on student work, and then not requiring students to respond in some substantive way to those comments is an act of martyrdom—a waste of professional time that produces an artifact of your spending time, but doesn’t benefit either you or your students.”
I wish I had heard and heeded this advice when I was still teaching!
Read more here.