Work local

The Internet takes us everywhere including enabling us to find customers for what we write. But don't neglect your own backyard. Your local library or libraries may have a notice-board or place for pamphlets. Ask first of course but why not a notice or flyer advertising your services. You could help with family-history or ghost write a book about someone's life. You could even create a poem for someone's birthday. Make yourself known, Your next customer may live next door.

Ezines

An ezine or electronic magazine is great. No paper, envelopes or postage. It lands on the computer screen of anyone who subscribes. Many groups send their newsletters electronically these days.
I have an ezine called Showbuzz with articles and photos about plays and musicals. I include music and drama games and tips for directors of shows. I even add news on my latest projects.
Showbuzz is a free monthly magazine sent from my computer to your computer.
You can subscribe from my web page at www.foxplays.com
You'll be most welcome.

Have keyboard will write

There are people who want a writer and will pay for their services. All sorts of people want all sorts of writers. All you, the writer need do is find that buyer and convince them that you are the one.
You could put an ad on the Net or in your local library or you could join some of the freelance writing sites on-line.
For starters you could Google freelance writing or go directly to www.rentacoder.com.
If you want to write to sell, take action then persevere.