I love Blender, and with the advent of Blender 2.5 alpha 2 I have been working through lots of tutorials to get up to speed with its new features (of which there are many). Here is a list of tutorial sites that I would recommend to everyone who is serious about 3D modelling. Most of these you have to pay for, but they are well worth it.
CGCookie Blender
Lots of great tutorials, going through creating a dragon, showing how to model a hand, head, eyeball, porsche, a mechanic, and many other tips and techniques and shapes.
They are also selling a very good, long, tutorial on creating a character…
http://www.blendercookie.com/2010-blender-training/
…where they go through modelling to materials, rigging, textures, animation, and lots more. I am currently going through this myself and it is turning out to be a fantastic series. Not everything is finished yet, but if you buy the series, you will get access to everything as and when it appears – and new stuff seems to arrive about every week and there is already a fair amount there to go through.
Blender Guru
A great site with great tutorials. Learn how to create weather effects, high rise buildings, and more. One of the best Blender sites in my opinion.
Blender Guru’s WOW factor
A great pdf book on using the compositor in Blender. A real must have. It goes through using the compositor to create various glow effects, vignettes, flares, and other image effects.