Divide the teams in half. You need to start with an equal number on each side.
Draw lines of the right and left-hand sides of a horizontal piece of paper. Draw one line for every team or competitor in the tournament.
Draw a single straight line between every two lines on the sides. Draw another single line between the two brackets now in the second column, and continue until you have just one line in the middle. For example, if you start with 16 lines, with eight on each side, you should end up with four columns that decrease in size until there are just two there are just two lines in the middle.
Enter the names of the teams or competitors in the columns on the end. They should be entered by seed. For example, if there are 16 teams, the No. 1 seed must be on the opposite side of the page from the No. 2 seed, and No. 1 must start against No. 16, and No. 2 must start against No. 15. The No. 3 seed must be on the opposite side of the No. 4 seed. No. 3 must start against No. 14, and No. 4 against No. 12 and so forth. Set up the tournament so, in the event all of the favorites win each round, No. 1 meets No. 2 in the final lines in the middle.
Enter the name of each winning team in the next open bracket. For example, if No. 1 is Northwest and No. 16 is Westside, and Northwest wins, write Northwest in the second column. Fill in the bracket with actual winners until you get to the middle. Most brackets don't have a dedicated space to list the final winner since there is no other round to play.