We keep the grass cut short. I notice when our grass (more weeds than grass) gets several inches high we start seeing ticks more often. We also have chickens which roam the yard during daylight hours. We had 30 guineas once. They're great if you can stand the noise. I didn't mind it, but it drove some of our dc crazy. And they're pretty stupid birds to boot.
Also, if any of us are going out into the woods, we spray our shoes, socks, and, sometimes, lower legs with Cutter. The ticks crawl UP, so this helps considerably - even though there's nothing natural about it.
I also put Advantage on my dog during peak tick season. Sometimes we do the cats also, but they seem to avoid ticks somehow.
Another thing to watch out for are damp areas. When we lived in Idaho ("high desert" they called it) it was very dry, so no ticks. BUT, when we camped near any water there were millions of them. Ticks love those high moisture areas.
We all do "tick checks" every night, too. I put a full-length mirror on the back of the door in our tiny bathroom so they can do this before and after showering. When dc were small, I did it for them - especially their heads. It's easy to miss ticks there.