Some of the really easy ways to remember something for a long time are:

• Draw or sketch whatever it is you are trying to achieve. Having a concrete goal in mind helps you progress towards that goal.
• Semiotics is the study of signs and symbols. Having an understanding of the symbols of a particular discipline aids in learning, and also allows you to record information more efficiently.
• Try to construct a story through keywords to remember anything for a long time.

Other great techniques are:

• Brainstorm
• Post - it notes
• Write down everything you remember and look for things you missed out and relearn them.