Use coinmarketcap < this tool is brilliant read through the list familiarise yourself with the characteristics of the coins that catch your eye. You need to look for coins with potential to increase in volume drastically, this can be caused by new coins featured on new exchanges exposing them to alternate traders.

My portfolio consists of ripple, monero, litecoin, maidsafe, factom, eth, dgb, bts and a few other altcoin that operate in areas that I am personally interested in. There are so many to choose from its important you understand the coin and its future purpose, plus it never hurts to read the white papers.

Be Safe, Ethan.