Learn About the Past
In the movie, Ted doesn't know anything different from the world he grew up in. To improve the present, you need to understand why things are the way they are so he seeks out information from the Once-ler. Learn how record labels grew and developed, how the music industry existed before that, and how mp3s changed things.
Getting information from the Once-ler isn't enough to help Ted change his society. He had to identify his mistakes and find ways not to repeat them. It's not enough to just study the past, you have to be willing to learn from its mistakes. What was done before that could have been improved? What shouldn't have been done at all?
Don't Be Afraid To Challenge the Status Quo
Ted couldn't accomplish anything without being willing to question and challenge the way things were. It can be difficult and even scary to step up and ask why or try something new, but overcoming that fear is the basis for nearly all of humanity's great innovations. So, don't be afraid to come up with new ideas, share and discuss them, and even put them into action. You never know what it will lead to.
Change isn't easy. There will a lot of obstacles along the way and a lot of people who fight you because they like the way things are. You need a reason not to give up and the courage to keep going when things seem impossible. Change requires passion and as the Once-ler tells Ted, "unless someone like you cares a whole awful lot, nothing is going to get better, its' not."