A very important advice that you forgot which can be relevant to many people is:
#11 unless you trade very often, always withdraw your funds from exchanges and store them on offline wallets.
It's not just the security issue (which is a big deal by itself with so many exchanges got hacked recently) but it simply gives you more flexibility on your coins. Every other day there are bad news on exchanges that raise they fees suddenly/take very long time to approve withdrawals and other things that can get you stuck with your money on the exchanges.