follows these steps
1.You must know what you are putting your money into GET THE RIGHT KNOWLEDGE
2.Get a wallet(like coinomi,jaxx etc)
3.Sign up for exchanges like bittrex.com, coinbase.com poloniex.com etc and also check daily coins price at coinmarketcap.com
4.Don't be greedy
5.For your money, see long term ,medium and short term goals. you could put 40% in short terms(like ethereum, litecoin etc), medium(may be 30% for coins like the ones below $10) and long terms(maybe 30% for coins with a good future that are less than a dollar)
YOU MUST DO YOUR OWN RESEARCH