How Do I Leverage Two Internships Successfully?

Dear Experts, I would like advice on how to leverage two internship opportunities against each other successfully. What are the appropriate steps I should take to choosing one over the other? Should I tell each one I've received another offer? Our Twitter Advice Project (T.A.P.) is no longer an active campaign. To find an answer to the above question, please use the "Search" box in the right-hand column of this website.