Every now and then you will hit a slow patch... so what should you do?
What I do is 3 things:
1- Shake the bushes. This means I call my accounts and see if anything is happening. Don't think that just because they love you they will call you. On some occasions I've had clients say "you know, I think I might have something for you later this week." If I didn't call them, the assignment might have gone to someone else that was on their minds at that time.
2- Go online and get yourself listed on as many FREE graphic design sites that you can. That way, when someone does a search for a designer, you have a better shot of being found.
I don't register with "auction" sites where the cheapest designer gets the job. I can't compete with "Johnny" a student designer from India that will do a logo for $25. Besides, "Johnny" doesn't understand the US market so his logo is going to be inferior. The person buying the logo for $25 doesn't understand how important his logo is going to be. Penny wise and dollar foolish. I like to work with people who are serious about growing their business. I have one client, an entrepreneur who in the past 8 years has created and sold at least 3 business. Every odd year or so I get a call from him... logo, business cards, promo-material, web. He understands the need of professional marketing material. And it's paid off for him because when he sells his business, it's turn key.. right down to a fantastic logo.
3- Fine tune your web site. Just today I received feedback that the person viewing my site didn't catch on that I work on a sliding scale... so I changed the color of my text line to highlight that point even more.
Bottom line: when you are slow is the best time to invest in your future by marketing yourself.