Watch the swing counties. Counties like Pinellas, Duval and Hillsborough to a lesser extent might give some early clues as to who will win the state. Biden will probably win the state if he wins Duval and Trump will almost certainly win the state if he wins Pinellas and/or Hillsborough.
I think whoever wins Pinellas wins Florida.
Not necessarily true Charlie Crist won Pinellas in 2014, Andrew Gillum and Bill Nelson won Pinellas County in 2018. Now you can argue that Charlie Crist winning it was not a big deal because he's from that area so of course he would do well in it but winning Pinellas does not necessarily equate victory in the state.