I use tortoise power, seriously! I do not spray my lawns, I have Lessor Celandine that come in the spring and lasts till May, then I mow it back and the grass comes in. The day I mow is the day I let my torts loose in the yard, they eat most of the weeds gleefully. In fact there are time I have to go hunt weeds for them along the railroad lines because they are so thorough. I did add Bugleweed (Ajuga) to an area on purpose to see how it naturalized, I like the results, very nice texture. Very pretty tiny purple flower carpet.
I am not a fan of to many chemicals, I worry about the bee's and want to do my part to keep my yard eco sound as much as I can. I will look at work, I had a great article for bird watchers on things you can leave naturally in your yard that will attract song birds. It was a great article, i am pretty sure I saved it.