Inspiration can be found in many places but the world wide web is where I usually start. I've an unhealthy obsession with design blogs and designer's portfolios. The following is a small list of some of my favourites:

Form Fifty Five

CMYKern

Johnson Banks' Thought of The Week

Design Observer

Typographica

Effektive Design

MARK

Socio

Universal Everything

Love Creative

SEA Design