Set a sensible starting bid and minimum increment from an item's fair-market value, then preview a clear bid ladder for your guests.
Estimate revenue from a fund-a-need or paddle raise using your audience size, participation rate, average pledge, and matching funds.
Build three balanced sponsorship tiers from your revenue target and the number of packages you expect to sell at each level.
Measure how many previous donors gave again, see your donor churn, and track how new supporters affect the size of your donor community.