Paul Arden is the ex Executive Creative Director of Saatchi & Saatchi. He's written a book. The book is called "It's Not How Good You Are It's How Good You Want To Be".
I think it's brilliant. It's pretty much the bible at work - every new employee is given a copy.
It's about ideas, and challenging yourself and pushing yourself to have better ideas. If you hate these kind of books this one is laid out very visually so it's really easy to read or to dip in and out of. It's well structured and features simple nuggets like the ones I've included below.
Buy it from Amazon now.
Don't put your own cleverness in front of the communication
Do not try and justify your salary with witty ideas. Cleverness is simplicity. The issue itself is often the message.
It's all my fault
Blame no-one, but your self, if you have touched something accept total responsibility for that piece of work. If you accept responsibility you are in the position to do something about it. If you are involved don't blame others.
Do not covert your ideas
Give away everything and more will come back to you. They are not your ideas anyway they are God's.
(Seth Godin also talks about this "Unleashing the Ideavirus".)
When the client won't buy, do it his way, then do it your way
Very often having given him what he wants he will give you what you want. There is also the possibility he may be right.
(We do this all the time at work, and it's soo effective.)