Its been pointed out already, but being skilled and confident at both verbal and visual communication will really help when presenting, (helpful skill seeing as designers present literally everything). A link from IDEO with some tips for creating presentations: This Advice From IDEO's Nicole Kahn Will Transform the Way You Give Presentations | First Round Review
Find and follow Blogs, Twitters, Linkedin pages and anything that can give you a constant feed of inspirations and insights. A lot of design firms often post projects, ideas, questions and advice. (Like the above link). You never know how finding something at random might help you with something you are working on.