I have started to use dcmp.org and I like it. They have many topics to choose from.
here's what I did: set Sign of the Day | ASL Sign Language Video Dictionary as my homepage. That way, everytime I open my browser, I learn a new sign.
Some signs are SEE and some are ASL. It will let you know if it is ASL.
That site is run by my current ASL 2 teacher: Dr. Bill Vicars. The videos are very, very good for practicing at home.