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Looking to learn something new?
Codin - Codesmite8,600 Points
The best way is through practice and practical use, the more you use the property the more likely you are to remember it, like most things you learn even outside of programming.
Smashing Magazine have a cheatsheet availible too: https://media-mediatemple.netdna-ssl.com/wp-content/uploads/images/html5-cheat-sheet/html5-cheat-sheet.pdf