Well some of these ideas are right here on your site!
An attention grabbing headline is not just used for a flyer or door hanger, the same concept works on the web.
The discount I thought would be a great way to grab their attention and kind of push them to contact me. At the price I charge per lawn, 25% really is not much of a loss if it turns into a full time client. cause really it's only going to be maybe 5$ or so but 25% sounds like a great deal.
Also for anyone else trying to start their website or maybe clean up their current one. Try using different font color and size on headline text to help grab the users attention. Just dont pick like 10 different colors and sizes. you only need maybe 1-3 colors for different headlines. Dont forget to space your text out to make it easier to read as well!
For SEO make sure to make use of the title tag and headline tags (H1, H2, etc)