i'm thinking of offering 4th mow free if they call before may 1st. will put it on a flyer, up to $40 in value. new customers only. i thought about giving spring clean-up discounts but i never had good luck with that....plus i'm mainly looking for "lawn mowing" jobs. i seem to make more $ at that. i don't always offer contracts. i think if i can get them to at least try my service and get them to actually call for an estimate i can get them for all year. what do you think of this idea??