How do you get going again when you've have been away from a project too long?
The first - and only - way that I can dive back in after taking time away is to reread the entire WIP. Undoubtedly, I'd forgotten details or plot points (!!!), and if I don't reread, the next sections come across as very disjointed.
But just as importantly, rereading also really helps amp up my motivation. Just knowing that I've already started spinning this fictional world gets my juices flowing to keep going.
And when all else fails - as in, I've taken time off and really, really can't seem to find the motivation to dive back in, I schedule time in which I have to write. I force myself to sit in front of the computer for an hour and see what happens. It might be 300 words, it might be 1300. But by mandating that time, I'm at least getting started. And from there, within a week or so, I'm usually psyched to keep writing.
So readers, what works for you when you've taken too much time away?