Have a look at some of these they really help if your running low on ideas :

Artists inspired work:
Chuck anderson
Alex morton (photographer)
adam benton
jeff finley
nicki hart
matt hill
mike wolff
dan maxwell

Some of these maybe hard to find.

Movements :
Art Nouveau
Art Deco
Surrealism
futurism
Neo-classicalism

Get your head in some very interesting stuff can be found

Also have a look at some of my submissions i have recently added i need some comments and ideas to improve.

Task : Over this x-mas i will be producing a large amount of photoshop and illustrator tutorials that will be added to my website when they are out, you will be the first to know.

Cheers.