The old fashioned way was to practice, practice, practice. Flashcards are useful.
You may try these sites.
http://www.mathblaster.com/free-game.aspx?pid=googpd&cid=%2Bmultiplication%20%2Blearn
http://www.honorpoint.com/
http://www.mathsisfun.com/tables.html
A few tricks:
The product of 5 times any number will end in either 5 or 0.
The product of 9 times any number will be a number with digits that add up with 9 or a multiple of nine
how do you learn multipulcation
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