PS 10 SNG $5 + .40 End 8th 12 Hands

Poorly played. I tried to make it w/QJs and had to fold on the River. Then last hand I had AKo and challenged another player. Flop 10 8 10. I decided he didn't have 10's and I was correct. He had 8's and had hit a set. Turn Ks. River Ah. I now have a lovely top 2 pair but they are useless against a set!! My brain seems t go soft when I play Dble or Noth.