Just Say NO
NOPE is the finite word and, you should be prioritizing it. Saying yes is the fastest way to burn yourself out. Just Say NO https://youtu.be/lEjJtFm2wOU http://users.elite.net/runner/jennifers/no.htm
1. Use the word NO
Not, ‘Not at this time’, not ‘I don’t think so’, not ‘I’m not sure’, not ‘Maybe next time’. The word NO is a powerful thing. Use it if you are absolute, unequivocally sure that there is no other answer. And don't apologize for saying it. If need be, practice saying the word until it loses its power over you. Repeat it NO, No, no...etc.
2. Another alternative.