Hi Paul,
We do alot of leaflets design and printing for our business and what we have found over the years is its best to have something on your leaflets that will prompt people to call you.
One of our first leaflets simply outlined all our services and had a price list. This really didnt bring in much business. The following quarter we did a leaflets that stated the " the first 30 customers to call us and quote "offer" would recieve a product we normally sell for £150.00 for £99 plus free delivery…..We found that this had more of an effect then the other leaflets.
I would also advice you to consider having your leaflets done on card with possibly something on there like a calender that will make people want to keep it.
Hope this helps