>OFFICIAL Commander website, where you can learn the rules, see the current banlist, and read the format philosophy, laid down by the rules committee: https://mtgcommander.net/
>Statistically see what everyone else puts in their commander decks based on what is posted to the internet. http://www.edhrec.com/
>Find out what lands you can add to your deck, sorted by category, based on a chosen color identity. http://mtglands.com/