The life of a freelancer is a life of uncertainty (as is true of most anyone's). It's hard to be sure where your next gig will come from or when. You could be writing for a blog that ends up suddenly shutting down after years of operation, or, an artistic different might cause you to go separate ways.
For these reasons it's best to juggle as many projects as you feasibly can (not to mention it keeps things exciting and fresh!). Much like investing in stocks, it's best to spread yourself out among several options. That way, if one well dries up, the rest can sustain you while you continue your search. However, be careful about overextending yourself. The opposite can also happen-ten projects can fall into your lap at once, and this may limit your ability to do your very best work (remember: you're getting paid for the quality of what you produce). By the same token, you're not getting paid by the hour (unless that's how you choose to charge clients), so you must learn to strike a balance between quality and efficiency.
"Where's My Story?!"
It often happens that you submit a story idea that has been accepted and you never see the story show up on the site and can't get in touch with the editors. First of all, give them time. Usually online platforms have a backlog so they never run out of content. If it seems it has been too long, get in touch with your contact and check in about the story. If your idea has been accepted, the story will eventually be published. Sometimes, however, these platforms will change their minds and choose not to publish the story or ask for further edits.