Good idea for a babysitting coupon?

I'm a frequently used babysitter during the summer and people tend to hire me more right after i distribute flyers.

I was thinking about adding a coupon to get more people to want to hire me, and as a way of saying thanks.
I was thinking about like "hire me 9 times, get the 10th free" but I don't really want to do that cause I think people will take advantage of that (like for the 10th time making me sit for free for like 5 hours or something). And, 10 times is a lot for someone to hire me.

Or, I was thinking about doing like "20% off the first time you hire me this summer" but i get really confused with math so thatd be embarressing if they ask me how much they owe me and i don't know.

Please help me come up with creative ideas!
...............................................................................
You could go with your first idea but do the 10th hour free instead of the 10th time.

You may want to think about a way to give a bonus to your customers that refer you to other people too. Maybe offer them a free hour of babysitting if they refer you to a client that books a job with you.

And if you want to do the 20% off you can calculate it ahead of time and then you will be ready when the time comes.
...............................................................................
Don't bother with a coupon.

Put your flyers out and describe your services. Add a few testimonials from previous clients.

If you provide a good, honest, reliable service, people will keep using you and pay you a fare price for your work.

This advice is valuable and it will work for you. I hope this is the best answer and most useful you have got to this question.


Hope This Helps!
Mark