Measuring the impact of your research and publications is subjective, but there are a growing number of tools that offer feedback on the use and reuse of your published research:
Here's an interesting article on the use of Altmetrics in the tenure decision-making process: What constitutes valuable scholarship?
Metadata, that is "information about your information," can make your research more discoverable. It can take the form of assigning keywords that make a publication more likely to be found by a database search or web service. The Bucknell Digital Commons provides an opportunity for authors to attach metadata to a publication as it is submitted, and also allows our Library staff to add additional metadata tags as appropriate.