The ImageJ community firmly believes in public discussion of the software. In this way, each question benefits not only the one asking, but everyone in the community, including everyone who subsequently does a web search on the same topic.
Searching ImageJ resources
There is a convenient online search interface:
Getting help with ImageJ
The recommended way to get help with ImageJ is to use the Image.sc Forum.
Ways to get help
There are several popular communication channels: TODO communication:
If you encounter problems, check the Troubleshooting page.
If you have found a bug, you can help the project by reporting it.