People donate because they want you to use their money to power up the project. So get proactive! Print stickers and other merch, cover costs associated with conference talks, and financially support people who make key contributions. Think about your community’s priorities for the project, and how money could help. For some projects it’s about code, but for others it’s more about community support, documentation, and outreach. If you’re not sure what’s most important to your community, ask them!