If you find our work and effort worth it, please consider donating. This is not limited to monetary contributions, every donation of a limited valuable resource (including your time, knowledge) is appreciated. Depending on your resources, there are many ways to help us.
A comprehensive and multi-language documentation is very important. With linguistic and no programming knowledge and some time, you can help us create (by asking) and maintain different translations.
In the Bug Tracking System, there are feature requests for some packages. The process of making packages is well documented, and with some GNU/Linux experience, it isn't difficult. But it takes time, so submitting well-packaged software is a great way to help us and save our time.
Of course, any skilled help is appreciated in developing core systems, like contributing code to pacman-g2 or the setup.
By sending us some wanted hardware (see donations), you can make testing packages easier, or speed up the package creation process within a specific architecture.
We usually update our artwork (background images, grub splash, desktop manager themes, window manager splashes and so on) for each release. If you are skilled to help, you're welcome. :)
If you have time and knowledge, monitor the forums, read the mailing list posts, hang around on IRC and try to answer the questions, solve the occured problems.
If you find bugs, you can help with submitting well-written bugreports, see the Reporting Bugs section for more info.