1.   At times, I think back to my life in Moscow.

2.   Great, I thought to myself, just my luck.

3.   He thought back to the carefree days of his childhood.

4.   I leaned against the wall and thought back to a graduation party at my old grammar school.

5.   I stood there, thinking to myself, Okay just let him wear himself out.

6.   I thought back to when I was his age.

7.   I thought to myself it is shock treatments.

8.   I was thinking back to famous historical sound bites.

9.   It amused me to think back to my life in London.

10.   Lying on his uncomfortably narrow bed, he thought back to the events which had brought about his present state.