I thought I would talk about a useful website I found recently called the "MTG Vault." What it basically is is a website that allows you to build your own decks online and share them with people that can comment on them and rate them. Basically a community built around deckbuilding.
This site is especially beneficial for newbies such as myself who want to get a feel for different types of decks and what a good deck consists of. If your into magic, I highly suggest you check it out.