Originally Posted by jgarri1
Do I need to warm it back up and try to get another blast of fermentation going?
No. Leave it alone, and check it again in a week or so. If it's still 1.016 then it's done (you won't always get to the "target" FG, for a bunch or reasons).
If it's something lower than 1.016, wait another day, then check it again. If it hasn't moved, it's done.
EDIT: by "done", I mean fermentation is complete. Then it's up to you whether you want to (a) bottle right away (b) leave it in the primary a little longer (up to 3-4 weeks total), and then bottle or (c) rack to a "secondary" for a couple weeks of clearing, and then bottle.
Personally, I'd go with (b), but the pros and cons of all these approaches are discussd endlessly here...search for "secondary" and read up!