I have been adding net 2% to Clinton due to a superior ground game. This article seems to suggest something like this is likely in many of the swing states.
http://www.politico.com/story/2016/11/democratic-insiders-hillarys-ground-game-will-sink-trump-230718
"The presidential race may be tightening, but Democrats are convinced they have an Election Day ace-in-the-hole: Hillary Clinton's ground game. They're confident it will withstand Donald Trump’s late surge in key battleground states.
That’s according to The POLITICO Caucus — a panel of activists, strategists and operatives in 11 swing states, seven of which are seeing significant early- and absentee-voting operations. In those seven states where large numbers of voters are expected to cast their ballots before Election Day — Colorado, Florida, Iowa, Nevada, North Carolina, Ohio and Wisconsin — more than three-quarters of Democrats think their party has done a better job turning out key voters thus far.
Democratic insiders are most confident in Colorado, Nevada, North Carolina, Ohio and Wisconsin. They express more uncertainty in Florida and Iowa."
Ohio is particularly interesting as most polls have shown it recently as very tight. I've had it in the Republican column. If Clinton wins Ohio, I think she's safe.