A Quick Look at CSS3 Multi-Columns Layout
Consider this as a concise tutorial on the topic. Right below the properties, are the demos - I guess that makes it easier for you to get a good grasp of the concept by just looking at the entire demo :)
The properties are self explanatory, although here are some points to keep in mind:
columnscan simply replace
column-ruleis used to specify a demarcation (a "rule") for the specified columns.