eject, you'll probably have got the message by now that Centaurus is talking though his arse. Disregard EVERYTHING that he said.
On the use of checks, there is a lot of good advice above in this thread.
Memorise your emergency checks. You'll need them one day. Sit in the aircraft on the ground with checklist in hand and run through them. Make sure you can put your hand to all the knobs and tits, smoothly and fast. Doublecheck what you're doing.
In an emergency, run through the drills from memory. Once you've handled it, get the checklist out and make sure you've done everything.
Memorise your airborne checks. This helps if you're juggling kneeboard, chart, chinagraph, cup of coffee etc. not to have to pick up a checklist. Run through the checks. Then drink the coffee and stow the empty cup somewhere it won't drift forward into the well and jam the rudder pedals, pick up the checklist and read it.
Checks on the ground are not so important to memorise. Therefore, probably more important to use the checklist.
Here's the nub of it:-
It's a checklist. It's not a dolist. Use it every time to make sure you've alreadycarried out the necessary action.
That goes for all checks. Use it every time to make sure. Don't be a slave to it, though. If you find you have to get it out to prompt you on your next action, you need to spend more time learning the checks.