Mnemonic tools and techniques, memory improvement
- several studies have demonstrated that memory depends on getting sufficient sleep between training and test.
- In general, the more emotionally charged an event or experience is, the better it is remembered;
- writing the answer can help; maybe saying it can help too;
Gedächtnistrainer: Reinhold Vogt (memopower.de) 
Textivate.com
Improve your memory (memorise.org)
Flashing Cards | Improve Your Memory
The Ten Best Vocabulary Learning Tips
How to Make and Study Flashcards – The Best Study Hacks to Know
Long term memory (Wikipedia)
Chunking (Wikipedia)
Memory (wikipedia)
Mnemonic Devices: Effective Memory Tools (yahoo.com) 
Mnemonic devices can help you recall names, details, even recipes! The sillier they are, the more effective they are! Go on! Get creative and write your own!Mnemonic Devices (about.com)
Introduction to Memory Techniques (mindtools.com)
How to Improve Your Memory (helpguide.org)
Mnemonics - Memory Techniques (faculty.bucks.edu)
Memory Techniques and Mnemonics (voicenation.com)
Memory Improvement Techniques (mindtools.com)
Using Memory Methods To Learn Vocabulary (timelessinformation.com)
How to... Learn a Foreign Language (mindtools.com)
Five Memory Techniques For Better Vocabulary Building
Automatized memory techniques for vocabulary acquisition in a second language