Bring your own resources to the table. Every grantor wants to see the maximum bang for the buck even when a match is not specified. Identify funds, partners, associated projects, volunteers, materials- anything that will help convey a sense of how far you will stretch the dollars you seek. Document the time and expenditures that go into the project beyond the actual funding you are requesting. Show the public support for your project.
Every project can benefit from grass-roots support and involvement.
Even if you're building an urban paved trail, volunteers can still help with cleanup, tree planting and bench building. Help the reviewers really see your project. Like a good news story, your application should come alive in the minds of the reviewers. Help them visualize what you hope to accomplish. Know your audience, and how much they know about your project and your goals.