"To" or "for"?

"To," and "For"

To: Used to indicate the place, person, or thing that someone or something moves toward, or the direction of something:

I am heading to the entrance of the building.

The package was mailed to Mr. Kim yesterday.

All of us went to the movie theater.

Please send it back to me.

Used to indicate a limit or an ending point:

The snow was piled up to the roof.

The stock prices rose up to 100 dollars.

Used to indicate relationship:

This letter is very important to your admission.

My answer to your question is in this envelop.

Do not respond to every little thing in your life.

Used to indicate a time or a period:

I work nine to six, Monday to Friday.

It is now 10 to five. (In other words, it is 4:50.)

For: Used to indicate the use of something:

This place is for exhibitions and shows.

I baked a cake for your birthday.

I put a note on the door for privacy.

She has been studying hard for the final exam.

Used to mean because of: 

I am so happy for you.

We feel deeply sorry for your loss.

For this reason, I’ve decided to quit this job.

Used to indicate time or duration:

He’s been famous for many decades.

I attended the university for one year only.

This is all I have for today.