where do you buy chalk?
Many lifting stores carry it.
My personal preference however is to head out to a store that carries climbing equipment and buy a chalk bag. It's the same type of chalk and it's much less mess, although a little harder to draw on your back for squatting.
You can buy it on the web, but I find it more expensive.
I have purchased chalk at a local gymnastic school and an "outdoor" sports store. The gymnastic store is a little cheaper and will gladly place a large order if need be.
at a pre-school,
or maybe just your local supplement sore, or where ever you would by a weight belt.
Eastern Mountain Sports.
thanks guys, never realised how big of a difference it makes until i tried putting some on before doing shrugs and it made me able to hang onto another 70lbs.