A professional organized (thanks Sylvia) I used to work with had a classification of people as either visual or camouflage:
It is helpful to know which type you are e.g. I am a visual which means if I can't see something it effectively does not exist. So e.g. I am not the most natural person to use a PDA, I've never used a tickler system since I know it would not work well for me, my work area at home has no drawers (except the filing cabinet) and I actually took the doors off of a home closet at one point to some benefit.
***I can put something out of sight if their will be an inner prompt to look for it*** e.g. I need underwear and it is in the closed closet, I need paper and I know I keep supplies in the bottom drawer. But unless a visual develops a strong habit e.g. OK every morning I will check the tickler file, OK every morning and throughout the day I will check my PDA, it would not work, or at least not be an easy fit.