The best next thing to tackle is reducing air travel and freight. Air travel should be one of those novelty things that the lucky few can justify, same with having something air freighted, sure its nice to get stuff 2 days, but reality is waiting a week or two isnt a problem. Unless I realllllllly need something fast I choose the slower cheaper shipping, and so what that it took 2 weeks to get something shipped from Florida to Seattle for a home project that can wait.
This is basically wrong, as Amazon has proven.
Of course, if you're buying for a specialty vendor that only has one shipping location that's across the country from you, it's going to take a few days to be shipped over by truck or train.
However, when you buy from a very large retailer like Amazon, they have multiple warehouses. Amazon has one in nearly every state now, last I heard. So when you order from them, depending on what you get, you may very well get it from a warehouse that's not very far from you, so you don't need air freight to get your item quickly. And those warehouses can, of course, be stocked by trucks or trains that take a week to get stuff around.
We really could be using more trains in the US for shipping stuff; it's a lot more efficient than truck, and it's compatible with trucks too, thanks to containerization (meaning you can ship a container from a rail terminal the last few dozen miles to its final destination, instead of driving it across the country with a truck). We've done a really bad job there, considering we used to have a lot more rail shipping.
As for travel, what we need to do is build SkyTran for shorter-distance travel to replace most cars, at least in the suburbs, and for inter-city transport. With pods that can travel at 100-150mph on suspended maglev rails, you'd be able to get around to cities within your region pretty quickly, much faster than by ground car, and probably faster than plane too since there's no TSA. For longer-distance travel, Hyperloop sounds interesting though it hasn't been proven (one problem with it seems to me that the passenger cabin doesn't hold nearly enough people to exploit economies of scale, but if it works out to have lots of pods, like SkyTran, then this might not be a problem). HSR seems to not be that great an idea; the speeds aren't much higher than SkyTran, it costs an absolute fortune to build (as it sits on the ground and has to be site-built rather than factory-built), it isn't suspended like SkyTran, and it isn't anywhere near as fast as Hyperloop.