it entirely depends on what you want to create. when i look for tutorials i try to have in mind what i want to accomplish because there are SO MANY of them out there. I belong to a graphic design forum that is very much photoshop driven ( we even play photoshop tennis) and there is a list of resources on that site in the Photoshop toolkit section
here is a link to the forum for photoshop.
Digikitten
you could also jsut click on my signature banner but it will take you to my gallery there and you'd have to navigate your way around.
here's
CBT Cafe mostly a web driven tutorial list
can't remember the real name of this site
www.newtutorials.com
http://www.sketchpad.net/photoshp.htm
Photoshop Guru
http://photoshopgurus.info/index.htm
here's a fanart site but they have some great brushes and tutorials you have to email her to get the access password but i got mine withine a few hours and it was worth it. her blending is beautiful and she has a great polaroid tutorial. also great if you want to give your photos a really glamourous look
http://touchstonesart.com/
and last but not least on my list of places to go for photoshop tutorials is
http://www.tutorialforums.com/
where else a forum dedicated to tutorials!
also check out
www.prettybrush.com she has some great tutorials
oh and
www.deviantart.com
whew that was a mouthful
I used ot have more in my favorites but i don't use them anymore so i only kept the ones that i wanted to relay to people when they asked.