Best way to HODL is buying in cheap and wait until it goes up it's value since if you can buy back once it goes down then it is good deal. But it will really depend on what you are buying if its BTC then it is good for long term but if its an altcoin then you may need to be aware that it could take months before the value it pump up even those top ranked altcoins we cannot make sure if the value will rise up.
That's why we need to make a research and analyzing and making prediction could help you be positive and not affect for those FOMOs and FUDs circulating in social media and forums.
Very few people are going to be effective holders precisely because of this, they let themselves be dominated by FOMO or FUD, and instead of holding their coins as they should they begin to sell them in the case of FUD or they buy them in the case of FOMO and then they wonder why they do not seem to make any money in the markets, if you are going to be a long term holder then you need to keep your coins no matter what happens and until you can do that then you will never obtain any profits as a long term holder.