The best way is the method that involves the least baggage with your new startup. Even if you have no lingering legal headaches at the new one (patent rights,

The best way is the method that involves the least baggage with your new startup. Even if you have no lingering legal headaches at the new one (patent rights, copyright, trade secrets), you personally need to be free of lingering distractions (miss your old co-founder, owe lots of money to former company's creditors, can't raise enough capital to keep yourself afloat all of a sudden) to the point that it's a step up and not just a lateral. Figure out how to do that, then do it as quickly as possible, like ripping off a band-aid.