New Memory Bank Needed

My memory has failed me before, many times. I must write all of my appointments down in my agenda and make a to-do
list or else I will easily forget things. I have grown used to the unreliability of my memory. This week, however, something entirely new occurred that has eroded even more my confidence in being able to remember important things.

I had promised to drop off documents at one of the local parishes. One of my friends needed them to make an announcement after the Sunday masses. At the beginning of the week, I went over what I needed to do during the week. I knew I had to deliver those documents. I did remember the task to be done, but as I went digging into the storage system that my brain uses to recall things, my memory brought up an image of my delivering papers to the very church where the delivery was expected. Satisfied I had accomplished my duties, I checked that task off my to-do list.

On the day the documents were needed, my friend called me in a panic and asked me if I had delivered them. She could not find them. I then realized that my memory had pulled a fast one on me: instead of providing me with accurate information on what I had done recently, it pulled up a year-old memory of my delivering pamphlets at the very same church. My memory has betrayed me in a brand-new treasonous way! Does anybody know where I can buy a slightly used but more reliable memory bank?