There are a lot of great websites out there for designers.  Here are my top 5 go to sites (in no particular order):

Psdtuts+

Psdtuts+ is a great site for… you guessed it… Photoshop tutorials.

Psdtuts+

Smashing Magazine

Smashing Magazine is the site I go to to read up on current trends in the industry for design, coding, and all things websites.

Smashing Magazine

Stock.xchng

Stock.xchng is a superb site for royalty free photography.  Whether you need the cheesy picture of two businessmen shaking hands, the lady representing a way too happy call center rep, or a picture of a daisy; this should be your first stop.

Stock.xchng

Creattica

Creattica is a great site for design inspiration.  So, when I get stuck on a design element, I check this site out to hopefully get me out of that rut.

Creattica

Best Web Gallery

Best Web Gallery is another site I go to for design inspiration.

Best Web Gallery