For me anyway.
I have a hard time telling people no. I always feel as if I am letting someone down.
Today I told a really obnoxious customer NO. Didn't tell her I was booked-(I'm not) as I would have in the past. Just a flat out no. I don't want to do it. It felt really good!! Of course I obsessed about what to say for about an hour before I called her back. And I worded it as respectfully business like as I could-a lot more than was offered my way.
I want to be treated with a little more respect and today was a small victory in that direction.
Thanks for letting me share!
Way to go!! Maybe now this customer will stop and think about her previous behavior (probably not, but hey we can dream!! 
)
You'll have to teach me how!
"I'm sorry, but it's just not possible for me to do that."
No justification, no long-winded explanation. Any responses of "why not" get more of the same. "It's just not possible."
This works with a variety of age groups and situations.
Kudos to you!!!! 
I also stress about 'letting people down' (even when they are wretched), but as I age, I am starting to learn to get over that. I like what this-mama-rocks said. I just heard yesterday to say, "I am sorry, but I am just not able to do that." No explanations, no drawn out story (usually my problem), just "I am sorry, but I am just not able to do that." It will take some work, but I am going to try to remember that next time someone asks too much of me. Congrats to you for saying what you really wanted to! I bet you took a deep breath after that!
Woo Hooo!!! I could use some practice w/ this technique in every day situations too! Way to go!
Way to lay down the law!! 
it gets easier to say no the more often you do it.
this past year i've told a couple of particularly fussy customers..."i'm sorry, i don't think i can please you."
i didn't say it snotty, just matter of fact, i really felt empowered too after that.
Quote by @%username% on %date%
%body%