If people were mentally able to divorce themselves from the idea that government is the solution to anything other than maybe fixing a pothole I'd have hope. Instead...this is probably the answer....

I think we are still a long way from that. States would have to start openly defying the Federal Government. Beyond the lip service some do now. Withholding income taxes from the IRS would be a start. Outright refusal of any gun control legislation. Kicking Federal Military out of state lands. These are the actions that would precede an actual secession.

"divide up the country by land mass"
This would be unfair to rural people. Urban people (depending on where you draw the boundary) are half the population but a tiny fraction of the landmass. Mr. John Wall points out that the rural people are more in extraction and farming, which actually need land, while urban industry does not. If you drew the boundaries by land mass, it would leave many rural people on the urban side of the border.

What's really illustrative, though, is to go down Wall's list of things each side can take and find only the ones that are unavoidable, not a choice. The first item is the best and only pure example: Taxes. If you don't pay them, they put you in jail and take your stuff; so that was is unavoidable. A few others are tangential to taxes: a military hammering other countries, for example, is funded by the taxes mention in item #1. The vast majority of them are pure personal choice: songs, TV shows, celebrities, religions, vehicle style.

America was specifically designed to insure freedom to those personal choices. "Life, liberty, and pursuit of happiness" is rightly a phrase that rolls of our tongues without thinking. If you stop to think about the words, though, it really means the right to all of those things on the list: Freedom from taxes, freedom from a distant central government building a global empire to hammer places even more distant, freedom from a state-established religion, and freedom for people to express unpopular ideas.

So while the divorce option is appealing, it's not the right approach. We don't need to need a nation state for people who like different cars and celebrities. We need to go back to the basic founding ideas of the US, which I think of as ideally an philosophical experiment rather than a nation state. Nation comes from Latin word for born. Ideally America should be an instrument for liberty that has nothing to do with where anyone happens to have been born.