Knowledge is your best friend!
Do your research and educate yourself! You are not going to find the facts about impacts to wild salmon or how to protect them on the tabloid at the check-out! There are many dedicated researchers who have compiled information about all you need to know.
Make a point of going to local film screenings or lectures in your community.
Join the facebook groups!
There's a facebook group for just about everything these days, providing people with a place to post info, learn from others and ask questions.
Some groups to join: