Organizing your work

Hey, I am new at this forum and hope to get along well.
SO how do you get your work organized?
I have been thinking about moving from pen and paper to keyboard and new reliable computer.
What do you think about it, is it worth it?
Can anyone suggest a software to keep my work organized?

Im sure everybody does something different depending on the size of there company. Im a small guy and I do all of my estimating, billing etc. I use a laptop with quickbooks. I have a printer in my van and do all my roof estimates on site. If we do the job I convert it to an invoice. I also pay my help and do all business transactions off quickbooks. Its completely paperless, accept for contracts.