I don't have a checklist but I think it's really important to have a checklist because sometimes when trading I forget a few things from the checklist before I enter and make a position which leads to loss instead of checking and confirming everything first before you take a position.
Have a checklist sticks on the wall, near a computer screen looks better and gives you feel of being safer because you are preparing good steps to trading safely. However, it is only first feeling and preparation, if later you become undisciplined, you will lose your direction in trading easily.
Another person, don't compose, print and stick a trading checklist like you but can still be disciplined in trading and succeed, because he has his checklist in brain and by being disciplined, success comes naturally. Of course, he need more than discipline to succeed in trading.