One important way of doing this is going to be shrinking our global military footprint in a big way. Which brings me to my proposal: end CENTCOM's entire presence within the first 100 days.
I know it sucks, but Dems have got to be prepared to inherit a munitions-and-readiness hole that is going to be expensive to fill, but which will need to be filled. Hardly the only such hole, but it will be a big one.