In actual fact, there is only one thing that can help us retain our lifestyles, and that is to change them. I believe that we can run modified American lifestyles on about 1/6th the energy we now consume. This requires for the most part a total infrastructure renewal: new residences, new vehicles, new workplaces, all designed for energy efficiency, plus the mandated withdrawal of all devices and buildings that don't meet the stringent new standards.
Once 5/6ths of the energy requirements are gone, the renewables we already have, plus the energy storage tech we have, are sufficient already.
So many people focus upon retaining intact the energy hog lifestyles we have. Thus we are doomed, because such lifestyles are obsolete.
In the 1980's I visited California while working at the job I had accepted, before my family could move here. I lived in a tiny insulated A-Frame house in a meadow. It had a 12v battery and a 350 watt wind turbine with hand-carved blades, which kept a single flourescent lantern and a B&W 9" TV going. It had a solar cooker I never used on weekdays, and a Svea 123 camp stove that burned unleaded gasoline for cooking at night.
I was comfortable, showering at work and eating breakfast and lunch at the workplace cafeteria. My host and I split the per diem allowance they paid me, and I quite enjoyed the experience for three months, using zero grid energy and a half gallon of gasoline, most of which went for heating hot water for dishes and coffee. Far more civilized than camping, as well.