Be familiar with the questions Fulbright asks recommenders to answer as you are making your choices.
Since these questions are quite diverse, you may need to provide your recommender with additional information, like resumes, copies of essay drafts, or have a conversation so that they can feel comfortable answering all the questions. It isn’t in your best interest for one or more of the questions to be left blank.
You need three recommendations. Not all must be academic (professor or someone who has supervised/mentored you in an academic area), but at least some should be.