This thread will have some links to some helpful brushes/fonts/tutorial sites.

Brushes

www.deviantart.com/#catpath=resources/applications/psbrushes&order=9

This link will go to Deviant art's brushes section. This has them in order of most popular, and a large amount of them are the best around. You will most lilkely get most of your brushes from here and it is the best place to start.

To install brushes simply once they are downloaded, paste them into program files>adobe>photoshop>presets>brushes. You will then be able to load them in PS.

More brush sites:
www.brusheezy.com/
www.psbrushes.net/
http://myphotoshopbrushes.com/brushes
http://getbrushes.com/

Fonts

www.dafont.com/
www.1001freefonts.com/
www.abstractfonts.com/
www.actionfonts.com/
http://betterfonts.com/
www.highfonts.com/
www.fontfreak.com/main.htm
www.acidfonts.com/index.html

Tutorials

www.deviantart.com/#catpath=resources/tutorials&order=9
www.tech-gfx.net/forum/
www.good-tutorials.com/
www.tutorialized.com/tutorials/Photoshop/1
www.photoshopstar.com/
www.photoshoproadmap.com/Photoshop-tutorials
http://psd.tutsplus.com/
www.photoshopcafe.com/
www.planetphotoshop.com/tutorials.html
www.absolutecross.com/tutorials/photoshop/
www.photoshoplady.com/
www.photoshopsupport.com/tutorials.html
www.tech-gfx.net/forum/
www.tutorial9.net/category/photoshop/

Image Hosts

http://photobucket.com/ - good because you can make your own account and upload your images and keep them all organised.
http://tinypic.com/
http://imageshack.us/
www.ripway.com/

Renders:

www.gamerenders.com
www.planetrenders.net
http://sutekirenders.com/
www.animerender.com/
http://celestial-star.net/renders/

12/6/10 - Updated 27.10.10 by d02
Amir has kindly rounded up all of his fonts and brushes and zipped them for CG, so here we go. There is a total of 1207 Fonts and 138 Brush Packs.
Fonts: Part 1/3
Part 2/3
Part 3/3
Brushes: Download

Credit to Amir for providing, and even bigger credit to The.Samus for updating the font list, and uploading to the CG File Server as Amir's server went down. Thanks heaps champ!
~dal.

This thread will continue to be updated.

Edited 4 times, last edited 22/7/11 - 1:21pm by ZSpider.

Looks to have pretty much all the reputable sources covered.
Good compilation kritikal

Add Tutorial9 to the tuts
www.tutorial9.net/category/photoshop/

Renders:

www.gamerenders.com
www.planetrenders.net
http://sutekirenders.com/
www.animerender.com/
http://celestial-star.net/renders/

Stocks:

www.freestockimages.net/useful_resources.php
http://boyis.com/ (Go to GraphicCG)
http://moe.imouto.org
http://gelbooru.com/
http://danbooru.donmai.us/

good job guys i reckon this is worth a sticky

Nice post, planet render FTW

nice o/p krit, http://www.smalltutorials.com/Photoshop/Basic-Skills/ is also good more so for beginners some of its pretty basic but theres a few tech bits i still use nowdays

thanks i need some more font site

flickr.com is a good image host

Tbh, I prefer fileden.com

No stupid annoying ads, a decent bandwidth, and it doesn't resize your pictures. Plus uploading is easy and you can also upload videos, music files, whatever.

thank you soo much

Probably one of the best resource sites out there
Includes, links to brushes, renders, stocks etc
this is where i learned some stuff. Would be very useful for everyone
i highly recommend using it

www.tech-gfx.net/forum/

Nice job

Do you know which ones work with GIMP?

AFAIK, everything except for the brushes.

add it to tutorials