How do you win at sudoku?

Answer 1

by putting the numbers 1 thru 9 in the squares (9 to a line across and down) as well as 1 thru 9 to each 3 x 3 sub square in the 9 x 9 larger square.

Answer 2

Simply, you place the right numbers inteh right places. EAch row must have 1-9 and each section (9 sections total) must have 1-9

Answer 3

You might want to check out some video tutorials here:
http://www.sudokupuzzles.net/tutorials/tutorials.php