[cabiness42]

There is no absolute "right" way to do it, but two guidelines I always use in setting a tournament structure:

1) Initial BB is 1-2% of starting stack (You are right at 1% so no problem there)

2) BB at the time you want/expect the tournament to end should be 1.5-2% of the total number of chips. In a 6 person tournament you have $120 in chips so an ending BB of $2 should work.

Then just stagger your intermediate levels in between your starting and ending BB. Something like this could work:

0.10 - 0.20
0.20 - 0.40
0.30 - 0.60
0.50 - 1.00
0.75 - 1.50
1.00 - 2.00

That's 6 levels. If you make them 20 minutes each you are reaching level 6 after 1 hr 40 min of play.

Edited to correct typo.