Admittedly, I'm not too worried about electricity, just transportation. There are any number of ways to generate electricity, but motor vehicles require a portable fuel so options are limited IMO to biodiesel and bioethanol, both derived from biomass. But I'm still not worried because biomass can be grown in a single season -- and will be when people finally become aware of declining oil and natural gas supplies. But it probably won't be a sudden shift, the switchover will likely take many years as gas prices rise.

One thing that might suffer is road maintenance, specifically asphalt-covered highways. Asphalt is a byproduct of gasoline and diesel refining. From what I've read the three are almost always produced from oil in the same proportions.

We can switch to biofuels, but how do we maintain our roads?