There should be a master key to all the places I need access to: the 53 m2 cave, my flat, my parents´s, their country house, the car park, the mailbox, the kitchen door, the concierge door, etc. But most importantly, there should be a way not to forget grabbing them before going out. One technique I came up with is recording in the ipod shuffle this popular children Spanish song that says something like “Where are the keys? nanananachimpon“, but then I keep forgetting grabbing the shuffle.
Enjoy the song. And don´t forget your keys.