How to Win Friends & Influence People by Dale Carnegie and The Seven Habits of Highly Successful People by Steven Covey are two classic books full of knowledge on how to build better relationships. Find the books here and here, and their summaries here and here.
If you are curious about how to contact celebrities, here is a great how-to guide.
And that's it friends. I don't have many resources on how to build better relationships, because I deeply believe that our experience is the best teacher when it comes to improving our relationships. I don't want to distract you from learning from your relationships, so I am not going to bombard you with extra reading. Instead, pay more attention to all of your relationships, looking for ways to improve them.