once per 5 hours only playing 3 tables is a bit too much.
For me prevention is better than the cure, so heres a few tips to help you multitable better and stop misclicking so often. Just to give an example, i knowingly misclick around once per week and usually play anywhere from 8-14 tables 6max.
Here are times when i seem to misclick often.
1. When i am playing tired or not totally immersed and focused on my play.
2. When i am rushing and not going through my routine each hand.
3. When my software fails.
These are my main three when it comes to multitabling errors.
So to prevent these...
1. I have a warm up routine, it's actually very simple. I have a few areas i work on each week, but before i load games i run over any type of poker hands to help kick start my brain.
2. I have a routine that i follow on each hand before i click. What i try to do is look first at position, then stack size, then whos behind me, then back to cards then click the button. This sounds like a lot to go through and it is, however it helps with a lot of things and helps me to never really misclick and never really pass up on marginally +Ev situations. Like, if i just look at cards first, it's so easy to just get in the habit of smashing the fold button as fast as i can go. with the routine above i very rarely miss a spot to open raise and i very rarely misclick if i am playing well.
It is a lot to process on each hand and does take a bit of a toll when playing multiple tables for hours, however it is trainable. After a while of doing this each hand it becomes natural and does not take as long to process each time.
3. This is an easy one to solve. Get the right equipment/computer for the job. 99% of the time when i multitable and something goes wrong/misclick it's to do with software errors. So make an effort (if you use software) to set it up to the best of your ability. Also make sure your computer can handle what you throw at it, there have been times when my computer memory simple collapsed from playing too many tables with a lot of software running on it.
Hopefullly this gives a little bit of insight into the things i work on to ensure not only that i don't misclick very often, but also to play well consistantly.
And to answer your question above, just go with the flow. So if you misclick call someone on a flop, pretend you just floated him, if he gives you an opportunity to bet then do so, but obviously there is no need to go crazy trying to chase the pot, at the end of the day you just have to take your medicine and limit the amount you lose in the hand. But i mean the best way is to just go with it and play it the most profitable way you can, it's essentially the same as normal but you are playing cards you normally wouldn't have.