OpenStreetMap is a fantastic project, it's very easy to get involved. Contrary to popular belief, you don't need any special hardware. The online editor overlays the editable, map over satellite imagery so you can basically just trace and label what you see.

For people who need a goal in order get started on a project, here are two easy ones which will improve the map tremendously:

1.) Learn how to label a street as one-way, and correct all the one-ways in your neighborhood.

2.) Learn how to label a section of road as a bridge, and how to specify that the bridge is higher than what it is intersecting, then label all of the bridges in your town.

The first one is easier, and should take you about 5-20 minutes to learn, and maybe an evening to complete. The second one is a little trickier, and may take you an evening to learn (if you don't do the first one first), and another evening to complete. Currently, both of these things seem to be a real problem for navigation apps that use OSM data. So correcting either will make a huge difference to someone trying to navigate in your area.