Useful tools to help you trade

Market News and Tools

http://www.coindesk.com - Overview of what's going on in the crypto world

http://cryptopanic.com - An aggregator of various crypto sites and news, filterable. Great for seeing trends and reasons why the trend is happening!

https://www.tradingview.com/ - Some of the best charting resources out there

http://coinmarketcap.com - Not just for checking prices, they also are the most convenient way to start your research as they have the blockchain explorers, official website links and also a useful API that can be linked to Excel.

http://cryptomaps.org - Visualization of price across different segments, primarily hashing functions and ICO release dates

http://onchainfx.com - A better version of coin market cap, has all sort of columns and you can add flags. Only downside is it only has 61 cryptos, but its always adding news ones.

http://icotracker.net - I like this site for looking at what ICO are coming up

http://icobench.com - Another ICO tracker which does nice summaries, shows teams, milestones, financials and gives a rating for each ICO

http://solume.io - compares the number of Twitter mention increase decrease to price

http://eveningstar.io - this is basically like Morning Star except for cryptos

https://bitcoin.tax - for calculating taxes owed on your crypto gains

Portfolio tracking

I would either use Delta, Blockfolio or Coinstats (you can connect your account through API but i've noticed that it hasn't been too accurate but still a good resource to see a general profit or loss on your currencies)

---