Most of the visitors to this site are probably familiar with Ravelry, but if you're not, it is highly recommended for a wealth of information about spinning and knitting.  Visit the links below for information on the following topics:

Spindle tip maintenance
Introduction to support spindling
Support spinning videos


Youtube has many videos on using support spindles and drop spindles, as well as different spinning techiques.

Spinning on Russian spindles (by Fleegle)
Spinning on Tibetan spindles (by Fleegle)
Introduction to Spinning, Part 1 (by Abby Franquemont, using a drop spindle)
Introduction to Spinning, Part 2 (by Abby Franquemont, using a drop spindle)