More Listings and Chruch Commitments

What is a good strategy for increasing listings while having increasing church responsibilities?

I am very active in my church from Sunday school teacher, choir leader, intercessory prayer, and nursery worker.  I haven't taken a lot of listings because of my minimal availablity for open houses on Sundays.  I have two Sundays a month where I am not doing a church work outside of being a saint and I can have an open house in the afternoon.  First service lets out at 11 am.

I want more listings but I also want to be fair to my seller.  I have been working with buyers mostly. It is a better advantage to have listings because the Realtor is in control of any market.

Any advice?