Once, I thought about how to be prepare for a flight, and not to miss it.

Sometimes, I notice some people exaggerating their word,s, telling any stories that look like more "sound more like fantasy" than truth.

There are currently living roughlyCurrently, about two hundred thousand people in the city where I livelive in my city.

I could have kept more from your original sentence, but stylistically it feels very awkward to have repetition (e.g., currently, roughly, or people live where I live.)

There are approximately 5 minutes left 'til' the end of the break time.

'til === (un)til. The apostrophe goes where the missing letters are

I wish I could stop time to have myget things done.

Well, that's all for now.

Also,Oh - I remember spinners once werwere once a dime a dozen.