Maybe try to remember the "tens" value (i.e., 30s, 40s, 50s) of at least one of the last numbers that you chose and then avoid that on the next one. For example, if you chose 31 and 12, which you would add to gather to make 43, and then 4 and 3 is 7, so you rolled a 7. Perhaps try to remember that you chose a number in the 30s and then on the next one have the first number be something in the 40s, 50s, etc. That might work.