I like the oscillating old sprinklers, but my small front yard now has a tree and several rose bushes planted in it, which block water from a traditional oscillating sprinkler.
The best approach would be pop-up underground sprinklers, but I haven't quite gotten around to that.
Instead I have a semi-permanent setup. The yard is basically a square, about 30 feet per side. I got some of those rotating ratcheting type sprinklers at the home improvement center, and put one at each corner of the lawn. The two closest to the house are in a small strip of dirt that doesn't have grass. I then attached them to a dual port hose timer. The two closest to the house go off first, and there's enough water pressure to run them well. Then the other two go off, again enough pressure to run them.
When it comes time to mow the lawn, about once a week during the height of the growing season, I just pull up the two outer sprinkers and move the garden hoses that connect them to the timer out of the way, mow, and put them back. The two that are setup closest to the house, in the dirt strip, can stay put because they (and their hoses) are out of the way of the mower.
This actually works well enough... eventually I'll dig up the lawn and lay down PVC pipe for a more traditional "popup" built-in sprinkling system. But for the past few years this hose-end system has worked well enough. Yes, you see the hoses during the week, but that's a small price to pay for a green lawn.
[this post was last edited: 6/26/2014-13:47]