How do I start a grass cutting service??

Find a horticulurist who goes to peoples homes and prune thier flowers, brushes..etc and exchange cards with them. He will take 20 or so of your cards and you grab 20 of his. After you mow someones lawn, tell them you know a guy who can make thier flowers look beatuiful and the flower dude will tell them he knows a guy that could cut the grass for his clients too...

Help yourselves by helping each other.