Claudio, when dealing with memory items, they will become clearer and more intuitive with the knowledge gained about the individual system.
If you do not see the picture behind your action, you may perform an irreversable situation, know what you are doing.
Learning recall items by heart can be done, it is not necessary.
Recall items are just a requirement to put you and the ship in a manageable situation which needs to be dealt with at a later, safer time.
You need to know your recall items, get me right, but understand the systems and you will most probably logically go for them.
There are items in the QRH which are not recall items, however, you and most of us are performing them as recall items; i.e. CTR Fuel Pumps to OFF when tanks are empty.....See what I mean?