There are many ways that you can volunteer your time to help other Genealogists and Genealogy efforts.
One of our favorite sites to highlight is Random Acts of Genealogy Kindness, http://www.RAOGK.com. RAOGK volunteers have agreed to do a free genealogy research task at least once per month in their local area as an act of kindness. It is not only a great site to get help for your own genealogy research needs, but it is also a site that you can "Pay it Forward" to help others. Please check them out.