Never check your cards until it is your turn to act, watch the other players check theirs and see if you can pick up reads. There is always information to be had by doing this, it is crazy how many players lack this basic discipline to their game.
Check your cards when it is YOUR TURN to act and MEMORISE then.
There should be no need to re-check your cards to see if you have a flush card or verify you’ve made your straight…this is just bad, bad play. You can do this for deception to sometimes make your set look like a draw.
Even the greats sometimes misread their cards, it cost Eric Siebel the Aussie Millions title in 2008 when he thought he had a nut flush draw and went all in giving Alex Kostritsyn the win.
https://www.youtube.com/watch?v=hZplz2lRmQM