If you have a good time horizon, make bets now on companies that stand to benefit from higher energy/oil prices.
GE being one, despite their finance arm. They stand to gain massively from growth in wind/solar power, as well as any new nukes.
Coke because it is so globally diversified.
Both offer divendend reinvestment, which provides a good way to keep money working without broker fees or worrying if the market goes down.
I think there is still plenty of stuff out there, if you are looking long-term.
Bet on energy overall, especially oil, getting more expensive. The most money to be made in any market is to get in on a rapidly growing small sector.
Given that humanity gets precious little of our energy today from wind/solar, that sector of the energy market seems to fit the bill. We will likely never really get all, or even most of our energy from such sources, don't believe the hype about that.
BUT
What WILL happen is that as other forms of energy get COMPARATIVELY more expensive, money/capital will flow into renewables, and the proportion of our energy gotten from them will grow. The cool thing about that is that since it starts from such a small base to begin with, it doesn't take much to get some pretty astounding gains.
Personally, if I had to bet the farm, I would bet on concentrating solar thermal, and any company that stands to benefit from "smart grids" and expanding eletrical transmission capacity. (did I mention GE?)
Good luck for whenever you do dip your toes back in.