Make a document about something

In Korea, most engineer did NOT learn how to make a document or manual of his/her work(s).
Today, I finished one job so I decieded to make a document of my about one week job.

The job was to make a BREW static library & put the BREW static library into the mobilephone.
One week ago, I have no idea about that. In that time I started to study about that and made it. Yesterday I finished my work and today I decided to make a document about that. It is NOT easy to me. Making program is easier than making document (or manual). According to the book or famouse person's comment, making document is more important than making source code.

Try and try to make a document.