Chunking refers to doing a little a lot not a lot a little.
The 20/7 chunking strategy/theory suggests that short term memory can be improved by reducing large amounts of information into smaller bits. For example, if you had to read a chapter for school and you had a week until the quiz, it would be more beneficial to read a few pages a night rather than to read the whole chapter the day before.
Strategies that work for dealing with memory issues include;
Being focused (no phones/tv/computers/music, etc when working)
Avoid cramming
Being structured
Mnemonic devices (acronyms, songs, jokes that help you remember things)
Re-reading
Visualization
Make connections
Sleep
Memory strategies include
Mnemonic devices
Chunking
Taking notes
One thing that has helped me personally is taking notes and then copying the notes I took by hand into another paper. While this isn't very efficient it can help reinforce the information.