Any one here have any tips or tricks on how to mental math better and faster or other wise known as human calculator tricks??

Any good recommendations for books and websites on the subject?

here you go

http://listverse.com/science/10-easy-arithmetic-tricks/

i am tempted to learn a few of these myself

also, books

http://www.amazon.com/s/ref=nb_ss_gw?url=search-alias%3Daps&field-keywords=maths+tricks&x=0&y=0

its called google dude, use it