Do your research.  Learn about projects and find ones that have long term appeal, good developers, active community.  After that, pick an entry point, don't get swayed by emotion.  Once you are in, buy and hodl.  Don't try to swing trade, don't try to diversify profits in lesser known and less viable products, aim to keep the total number of tokens or coins as you started off with, store in a safe place, preferably a hardware wallet, and wait.  Obviously everyone has there preferences and opinions on the matter, but this is one I have used and has been working for me so far.

Best of luck.