"think back about" is a valid phrase used in written English.
It is used to refer to a process of recalling past events or memories. For example, "I think back about my time in college fondly."
It gave me a chance to think back about why I did things the way I did them.
"I think back about how the alcohol and drugs got me to be so mean.
And it will be something happy to think back about — if you're left alone.
Now that I think back about how movingly Temelkuran writes about the difficulties faced by women in today's Turkey, it occurs to me that Pamuk's "Strangeness" is also very strong on this subject.
"I think back about my time at West Point and I know that if 'don't ask, don't tell' hadn't been in place, my experiences as a cadet would have been a lot better," said Ms. Miller, who is a special assistant at the Center for American Progress, a research organization in Washington.
Reading a preview copy of the book led me to think back about the first time I met Tony, and what an impression it made on me.
She thinks back about her brother, and about her old dead friends, and about their nighttime adventures in cars.
But when he thought back about watching the film, it was always Mr. Hutton's performance that jumped to mind.
Cashman thought back about that time in July of 1999 when Pettitte almost became a Phillies pitcher.
And when I thought back about The Killer Inside Me, the idea that it was providing a moral message about violence against women began to look absurd.
"You don't really think when it happens that it affects you, but afterwards, when he started to recover, I thought back about those weeks after it happened and it was a really tough time.
