How to collect rain water

My 101 year old grandmother has an old fashioned rain barrel (a wine barrel fashioned from nono's wine making days) on the corner of her greenhouse.  We use it to this day to help water everything from seedlings to growing vegetables.  Here is a great article on how to do this yourself!

Rain Barrel How-To, Rainbarrels, Rain Barrels, Rainfall Calculator: Gardener's Supply