Skim through the categories, find a couple of sections for the genre of work you're really good at writing, and write down some of the addresses. Do the same as above. Write for guidelines. If your work fits the guidelines, send a copy in for review. Again, it could take a while for a response.
Some magazines are so overwhelmed that it takes up to a year to respond.
Don't give up. If you're interested in writing online, go to page 1051 of The Writer's Market. It lists different resources, publishers, and other tips. If you visit one of the sites, you're likely to find a page of links on that page, which will lead you to many other sites which are not listed in the book. It's a good source for related information for writers.