I don't understand pensions! Anybody know of a good website that absolutley breaks it down for idiots like me?

Like most younger people who suddenly realise they are getting older, I need to understand to provide for my future, and I know a financial advisor can answer questions. I would like to be a little more 'match-fit' before i start getting flogged a load of stuff I won't understand, and I hoped there was a website or book that anyone has come across which really lays it out for the layman! Ta.