On topic, it's very easy to do.
If you want to dispute the point I'm about to make, do it silently, because no one is going to take you seriously. This is a point that applies to every economic, social, and moral problem in the world today.
Government and business are the two entities with the power to enact the most change, for good or ill, in the world today. The first is motivated by power, maintaining it and increasing its scope; the second by money, both maintaining its flow in to personal accounts of investors and increasing that flow. These are the only carrots the rabbits in question will respond to, power and money. To manipulate either entity to do what you want, you must affect its supply of power or money accordingly. When government does as you please, you allow it to retain its power, when it acts against your interests, you take that power away. Ditto business and money.
Indvidually, we are limited in the affect we can have on either entity. We can cast a vote, we can choose a brand. As a group, we can profoundly impact either entity; we can join a campaign, we can campaign against a candidate, we can spread the word about good companies, we can start a boycott against a company.
Insurrection and property destruction are the most extreme examples of this, and it is neither legal nor moral for me to reccommend either one. So don't. Tyler Durden and George Washington need not apply.
So how do we, as a group, manipulate business and government into reducing our dependancy on oil? By making its continued use diminish their power and wealth. Stop buying SUVs, stop driving short distances, stop voting for the same-old same-old. Buy a bicycle, throw your vote away on a third party candidate, choose gasohol over gas, public transportation over private, carpooling over solo trips. If I do it, no one cares. If WE do it, they will sit up and take notice.