1. Be firm -- not defensive or overly apologetic -- and polite. This gives the signal that you are sympathetic, but will not easily change your mind if pressured.
2. If you decide to tell the person you’ll get back to them, be matter-of-fact and not too promising. If you lead people to believe you’ll likely say "yes" later, they’ll be more disappointed with a later "no."
3. If asked for an explanation, remember that you really don’t owe anyone one. “It doesn’t fit with my schedule,” is perfectly acceptable.
4. Remember that there are only so many hours in the day. This means that whatever you choose to take on limits your ability to do other things. So even if you somehow can fit a new commitment into your schedule, if it’s not more important than what you would have to give up to do it (including time for relaxation and self care), you really don’t have the time in your schedule.
kalau yg mintak favor tu close friends/family members/boss camne?