It depends on what you mean.
If you mean in the sentence 'By the way...' then, no, no colon would appear there.
However, if you mean in a byline, then, yes, a colon would go there.
(A byline is, 'By: John Smith' or 'By: Shirley Temple')
You use a semi colon after a word for example:Shoneka writes poertry;she is published in a litery magazine.
Because a semi colon replaces the word "but" which means it's more complex.
the colon is just another word for large intestine
No. A colon never goes after the word "by."
Neither really. 'In' would be the word to use.
You could either: play a game, watch movies or listen to music
i would use a semi colon ; just because that is More formal.
It doesn't is correct.
after a preposition
No. Use 'indescribable'.
It is correct to say "used to do".
I think that it is always correct.