Coinbase (simpliest online wallet if you're new):
https://www.coinbase.com/join/59b6abc779dfbf00e599d519
get 10$ for free when using my link!
Bitcoin lending (earn by lending bitcoin)
https://bitconnect.co/?ref=grinofdawn
Altcoin Exchange
https://www.binance.com/?ref=15781110
It has everything I really need, can't complain.
Free Bitcoin: Earn free satoshis every hour
https://freebitco.in/?r=10970177
Reddit: (to know what people think and what's new)
https://www.reddit.com/r/CryptoCurrencies/
there are many more subreddits
I'm sure there are many more useful sites that I didn't mention. But part of being in this crypto market is knowing how to do your own research ;)