For years, I'd say yes to almost everything, trying to be nice and generous. Feeling obliged to be of service to the world. Maybe also a fear of being forgotten if I don't. But I paid the ultimate price in doing that, because for all those years, I got almost no work done! Some famous authors have written about this: that if they said yes to every request, then they'd never have time to write another book again.
Derek Sivers