Go over your notes...

Go over notes one day after learning them, then one week later, one month later, then every six months
Review is not just repetition. Actively reviewing your notes can a least double your recall. By reading over your mindmaps, grabbing your notes and go through them or talking about and discussing your notes, your recall will stay at 90%. However, if you do not review your notes for three days, your recall will drop to 30%. You will forget 70% of what you have learned in three days. without active reviewing. Most information is forgotten because it wasn't moved from your short term memory to your Long term memory. Reviewing ensures new information is installed' into your long term memory. Make it a priority to revise you notes the very next day to keep them at 90% recall.
If you wish to keep your recall at 90% then you will need to review your notes within 24 hours, then one week, one month and every 6 months.
An important reminder when reviewing... each subject should only take 3-4 minutes for review. Only go over your notes and mindmaps, not the original book. Only refer to the original source of information if you need clarification of facts, details and information.