The more that you incorporate things that you truly value into your life — from knowledge to skills to people to activities — the more value you not only bring to your own life, the more value you bring to the people and places you encounter on a daily basis.
Looking someone in the eye when you say “Thank you.” and sincerely meaning it.
Saying “You’re welcome” to others — clearly — and with meaning.
Artists, writers, and creative-types who create content are almost always “starving artists”. Helping to bring a greater awareness to their work is one of the kindest things you can do. Social media makes this easy. Even a single “like” to an artist’s page can be encouraging.
Regarding your sources of online entertainment and education:
Providing feedback to these places is HUGE.
Sending a short “thank you” email or positive feedback to web sites (yes, even BIG ones — but especially little ones) or people who help make your online experience more enjoyable is extremely encouraging. While likes and +1s and shares are awesome — actually sending written positive feedback expressing why you like what you like is extremely valuable to those who create original content.
* And any time you happen to be on the receiving end of positive feedback, save it and refer to it later! This is what positive feedback folders are for!