I am trying to condition myself to jump on GNU Social,instead of Twitter and G+. It is working somewhat; today about 3/4 of the hour I spent on social media was on GNU Social and even though it lacks some convenience I am able to find good things to read and meeting interesting people.
Substituting a small company like duck duck go for Google is fairly easy. Try to support local stores in preference to Amazon is difficult, even knowing that shopping on Amazon reduces my local shopping options in the future.
Somehow we need to support local economies, support people creating products with either no middlemen or at least fair marketplaces that perhaps only taking away 5% fees from producers. The game is rigged for large corporations, but we can still "win" if even a small minority of people participate in local economies and non corporate web properties.
Catherine Austin Fitts has a saying that I like: "There are people who make pies, and people who steal other people's pies." (Ref: solari.com)