Other times we need only worry about being able to recall material. Writing an entry in a dairy, for instance, is not done so that we learn it or commit it to memory. It is simply an aid to being able to recall something that needs to be attended to on a particular day. On the other hand, learning how to use a diary or a personal organiser in the first place is about committing things to memory. Some of the many things which can be used to help us commit things to memory and to then be able to recall them, include word associations, mnemonics, word substitutions, numbers, images, linking items, using prompts such as events, sensations, thoughts, pictures, smells, tastes and so on.
Some people actually find the use of repeated absurd phrases, crazy rhymes and songs very helpful.
Writing reminders, using diaries and reminder notes can help a great deal. As can organising ourselves better. Routine can also be a great help. If we crowd too much into the time we have at our disposal, of course we will get disorganised and overloaded. Courses and materials on time management and personal organisation can also be very useful.