Like networking with the like minded and give them your business whenever possible. Small business owners can barter if possible.
Conversely, refuse to engage with people & businesses who's politics run counter to your interests.
It may not be much but its at least action you can actually take that might have benefits down the road, or at least give others pause for thought.
For anyone interested, here's a link to the political leanings of many businesses: http://shopyourpolitics.com/
I intend to do just that. I will seek them out and do business with only them. Not much I need anymore (old), but still, contractors, etc. will get my business.
I will do without before I purchase another "Made in China" product. I will seek out the American oil companies for my gas.
I am only one, but it's a start. On top of that I will DEFRIEND any old acquaintance that voted Obama, and tell them to their face WHY.