See
State of Florida.com - Florida Residency
When I first read this I was thinking you meet to move to Fl or not. The 6 month and 1 day recomendations are correct. The first rule is where do you intend to have your principle residence. Next you have to prove this to the states. Thus if you move from NY to FL and intend to have FL as your principal residence you should change your drivers license to Fl, register to vote in Fl, don't vote in NY, change your mail address to Florida, and have a place to live in Fl. If I was using a local NY bank I would also change to a local Fl bank. Since you intend Fl to be your home and have made the above changes I would count travel time away from home (Fl) as time lived in Fl in order to get the six months. If you were traveling and your spouce was staying at the Fl home that would also be a plus. The problem is if you try and spend 50% of your time in both places. If that is what you are doing I would try to make sure that for the first year or two I was actualy in Fl for 6 months and a day just to be sure.