Diversity has helped my business grow.

The thing I've learned over the years is it's not so bad to do and develop a number of related skills.
Which means being able to offer clients different but related services. This has been a particularly challenging year but by being able to do web development, Search Engine Optimization and graphic design work, when one area is slow another area heats up. If no areas are hot then we go out and play: ) Can't wait for that to happen!
I made a serious effort to develop more skills as I went along so that I could grow even when the economy is tight.
Along the way, clients have asked for a particular need and if it made sense, I went out and provided it for them and learned by doing it. Don't get me wrong, If I can't do something at a very high professional level, I will bring in an expert in that field. There is something to be said for being a specialist but to offer 3 services sometimes is better than one. So diversify and gain new skills and new business.