Lexis, Westlaw and Bloomberg Law all have certification programs which will help improve your research skills, as well as give you an impressive credential for your resume. Many of these trainings can be completed online. Here are some links with more information:
Bloomberg Law Certifications – http://www.bna.com/blaw-cert.
Lexis Certification – http://www.lexisnexis.com/en-us/lawschool/prepare-to-practice/home.page (Includes an on-campus training. Contact Jennifer Durkin for details)
Westlaw Certification – https://lawschool.westlaw.com/marketing/display/WT/2