Although they throw alot less light than the 500w work lights, I've switched over to screw in flourescent bulbs (they fit into regular light sockets). Specifically, the GE softwhite flourescents. They generate almost no heat, so your actors love you and you don't have to take breaks to let the set cool down. The light is nice and soft as well, so it's quite flattering and you can run 3 of them for the same amperage as 1 regular bulb of the same output. This makes them great for lighting outdoor locations with a car lighter adaptor!
For the sockets, I am using AC Delco clamp lights (the AC Delco's have holders that won't fall apart after using them for 10 minutes).
For 25-50 bucks, you can get a light stand that will reach 8 feet which will normally be enough for any application you'll use these for. I'm currently using boom mic stands for everything, they work well enough, 3 scoops clamped to the top of the boom make a good key for my purposes, then 1 low and offside for fill (or bounce with a piece of foamcore from the craft and hobby store). I'm still working on a good way to hair light (I may actually buy a stand with a weighted boom for this one light).
I have foamcore that I've spray painted silver on one side and gold on the other for reflector and Will Vincent left his silver foil window shade here from the last day of my feature shoot. I have white foamcore as well for soft bounce and black foamcore to use as a flag. I've found it useful to keep masking tape and tagboard on set and location for building quick light blockers and even my french flag on my camera was made this way.
Each clamp light with bulb runs about $15-$20. Foamcore runs $10-$15 / 2'x4' sheet. Ebay has folks selling lighting stands (also markertek.com, bhphoto.com and I'm sure several others - check your local photo shops too...they will throw fliers up in their windows if you shop there alot
).