1)
Close the following windows in laptop or phone: coinmarketcap, blockfolio, cryptocompare2)
Live3)
Reopen in few months4)
Enjoy 
this happened in the past, and will also happen again in the future.. Blockchain will succeed, the market is still only a minimal fraction of what it is going to be in some years.. dont be stupid.. dont follow the mainstream's fear. use your brain. this is all just panic. only the strongest hands will survive!
ps: keep the good vibe, ..positive comments are welcome, ... negative comments keep for yourself or post in a suicide forum, i dont care!
(THIS IS SPECIALLY DEDICATED TO YOU .. username in bitcointalk : "ZOMBIES" .. go away and buy a friend!)
Probably one of the best advices about how to deal with this crash unfortunately I do not think that a lot of people are going to follow that advice, I really think that many are addicted to looking at their holdings and how they are doing, it should not be like that especially if you are a holder, even if I have not sold and I do not have any intention to do it I will admit that I'm guilty of keeping those sites open and checking them more than I should.