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

Sometimes, I notice some people exaggerating their word,s, telling any stories that look like more "sound more like fantasy" than truth. Sometimes, I notice some people exaggerating their words, telling stories that 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. Currently, about two hundred thousand people live 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. 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. I wish I could stop time to get things done.

Well, that's all for now. Well, that's all for now.

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