Paragraph Formatting: One paragraph/one idea

Bad Example:

Thanks for the email message. I was thinking of dropping you
a line myself. I don't think I can come to the meeting on
Thursday. I have classes until four o'clock, and after
school I'm going to Shinjuku with Mayumi to see a movie. She
has two free tickets, but they're only for Thursday, so we
have to go on that day. I guess the meeting will be about
the trip to Kiyosato in July. I heard that Koichi, Shunji
and Takeshi have plans for the second half of July, and want
the trip brought forward by a week. Personally I don't mind
either way. Just let me know what you decide at the meeting.
By the way, did you know that Keiko quit the tennis circle
last week?

Good Example:

Thanks for the email message. I was thinking of dropping you
a line myself.

I don't think I can come to the meeting on Thursday. I have
classes until four o'clock, and after school I'm going to
Shinjuku with Mayumi to see a movie. She has two free
tickets, but they're only for Thursday, so we have to go on
that day.

I guess the meeting will be about the trip to Kiyosato in
July. I heard that Koichi, Shunji and Takeshi have other
plans for the second half of July, and want the trip brought
forward by a week. Personally I don't mind either way. Just
let me know what you decide at the meeting.

By the way, did you know that Keiko quit the tennis circle
last week?