http://coinmarketcap.com/ Lists all cryptos by total investment in them with links.
http://www.coinwarz.com/cryptocurrency Lists the most profitable coins to mine in real time.
http://bitcoinwisdom.com/ Charts for tracking prices.
https://markets.blockchain.info/ Charts for tracking prices.
http://www.coindesk.com/ Great news site dedicated to cryptos
http://www.reddit.com/r/bitcoin Real time news feed, all things bitcoin.
https://coinbase.com/ My go to exchange to buy and sell bitcoins. Not for day trading though.
https://blockchain.info/wallet/new Best online wallet service, does not possess your private keys on their servers in any way. So if they get hacked you lose nothing as long as you have a backup which is as easy as clicking 'Download' backup and saving it to your hard drive.
http://www.thebitcoinchannel.com/ Excellent site that links all other relevant sites and provides great insight into cryptos future and current news. Below is their list.
https://airbitz.co - US Bitcoin Business Directory
http://www.coindesk.com - Bitcoin News and Press Releases
https://coinbase.com - United States-based exchange which is good for buying small amounts of Bitcoin.
https://www.circle.com - Free platform for buying, selling, and accepting Bitcoin.
http://coinmap.org - The world’s largest Bitcoin Directory
http://bitlegal.net - Regulations and laws about Bitcoin in every jurisdiction in the world.
https://bitcoinarmory.com - The Gold Standard in Bitcoin Security.
WeUseCoins.org - Best place for beginners to start.
Bitcoin.org - Official site of the Bitcoin project, download the wallet software here.
BitcoinTalk.org - The official discussion forum, and large enthusiast community
Wiki.Bitcoin.it - Encyclopedia of most aggregated Bitcoin knowledge, very extensive.
Bitcoin.it/wiki/trade - Partial list of companies that accept Bitcoin as payment
BitcoinMagazine.net - Professional publication and news portal
Blockchain.info - Tool for viewing accounts, payments, and numerous economic statistics.
BitcoinCharts.com - Shows current market prices and economic statistics.
Preev.com - Super easy Bitcoin<->fiat calculator, multiple currencies supported
BitcoinMonitor.com - Live view of transactions as they happen on the Bitcoin network.
Bit-Pay.com - Another excellent merchant solution for businesses that wish to accept Bitcoin payments.
Coinabul.com - Leading gold and silver bullion seller for Bitcoin
MyBitcoinMint.com - Selling silver Bitcoin-themed 1oz rounds
SpendBitcoins.com - Enables you to buy credit with major brands like Amazon and Southwest Airlines for Bitcoin.
WorkForBitcoin.com - Bitcoin job board - freelance projects which pay in Bitcoin.
StuffExists.com - Extensive repository of hundreds of other resources.