1. Set boundaries.
Think about the areas in your life that drain you. Think about the people in you life who suck your energy. What sorts of tasks and obligations leave you feeling exhausted? Your answers will reveal where you need to create boundaries.
Saying no isn't always easy, but there are graceful ways to do this without hurting other people's feelings. For example, when declining an invitation you can say "This sounds like such a wonderful event and I can tell that you put a lot of love into it, but unfortunately I have to decline. I really look forward to the next one." Honor the invitation, but stand up for what you need.