If you are multitabling and it's making you play worse, then you need to consider dropping a table. Having said that, you do need to be able to pick up the texture of the board quickly and tbh the simplest thing to do is look at what beats your holding. A king when you have queens is an obvious one, as is 88x when you have kings. That's not to say you are necessarily behind in these hand - mostly you won't be - but it does mean you need to be immediately, instinctively on your guard and are prepared to fold if played back at.