senshistock on deviantart is great for poses, i use that a lot, and designdoll (a program) when i cant be arsed to trawl through tonnes of poses for something vaguely right
as for general references, i really tend to just.. google stuff. and get a chance to go out and practice drawing them; a lot of my comic is set in natural scenery, so I took a lot of photos and drawings on a trip to the Hebrides that I use as reference.
i also have a tag on my tumblr for stuff that i could find useful for drawing, influencing aesthetic, or background / setting ideas.