drying chemicals varies HUGE amounts depending on what your drying... look on rhodiums site and it has a few documents on drying agents and their suitability for different things and the correct proceedure...
as for acetone items once again look on rhodiums site, there is a huge section on beginners info for meth etc... and in the stims forum the sticky post up the top, has a collection of post links so you dont even need to utfse.
-AC