Beware the impact on your time of the Energy Vampires. These are the people that will suck up all of your time with little return. They will often disguise their needs as 'urgent' in a desire for you to drop what you're doing and come to their aid.
Stop reinforcing their behaviour by setting time aside for them. If their request is not an urgent company-critical issue then offer a polite - "I'm under a tight deadline right now and can't help out this week".
Don't allow these people to compromise your schedule and your needs. Their time consumption can be insatiable. Become more conscious of putting your needs first and let the Vampires Beware!