Search for work from home with realistic expectations.
Legitimate work from home listings look similar to normal job postings, with "telecommute okay," "this is a home office position" or similar location references.
Put some time and effort into creating good resumes and cover letters. Unlike jobs outside of the home, you most likely will never have a chance to personally make a good impression. Your resume/cover letter are your first impression.
Have a resume prepared for each job type you are seeking. If you are applying for both writing and customer service positions, have a resume prepared for each and for writing, have samples ready to submit.
Fill applications out completely. Companies that hire home workers get more applications than they can keep track of. If you don't at the very least fill the application out completely, you will probably never hear from the hiring organization.
You can even utilize websites like Indeed, Craigslist and Career Builder to find work at home, but keep an eye out for scams no matter where you go. Simply enter search terms like "remote position," "virtual," "freelance," "1099 position," "telecommute" and "home office."
HOW TO AVOID BEING RIPPED OFF OR SIDETRACKED BY WORK AT HOME SCAMS
To keep it very simple, there is no big secret to working at home. Many people do it. There is no magical system that you can pay $1, $10 or $1000 for that is going to teach you how to generate money with no effort.
The reason some people successfully work from home and some people continue to get ripped off has to do with having realistic expectations.
Work at home simply refers to a location. To work at home means you either own a home business or you work for an employer, just at home.
When you see ads or receive emails about opportunities promising you thousands a week if you just come watch the video, pay for the sytstem (you get the point), etc., you are better off to not waste your time.
But, if you are serious about working for a living from home, there are ways to do so. But, you will have to work to make money.
Good luck with your search. There are many good articles, resources and directories here.