1.) Grow a spine. 2.) Learn to politely say no. When I say politely, I mean to give a valid excuse why you can't spend 100% of your time on said request. 3.)

1.) Grow a spine. 2.) Learn to politely say no. When I say politely, I mean to give a valid excuse why you can't spend 100% of your time on said request. 3.) Offer alternatives ie: I know person X who could help you with Y, but I likely won't be able to get to this for a few months and it would be a better use of your time to talk to person X. In my career, I've never ever had a problem with saying no so long as I am able to offer a viable alternative for the user. Just thickening up and growing a spine will make you a lot less frustrated, try it sometime. Saying no is empowering :)