(study, learning, details)
You know that old saying that the Devil is in the details? That's absolutely the case today. Pay close attention to the details. Read, reread, and then re-reread everything. Make sure you have a clear picture of the exact situation in which you find yourself.
Another that is appropriate for today: Trust but verify (it even rhymes, in Russian).
There are things you need to learn, information you don't yet know, so trusting that you have the lay of the land is premature. Allow today to be a day of finding out, or at least of laying the groundwork for doing so. That way if/when you bite off more than you can chew, you will at least know just how much "trouble" you're in.
Oh, and if you've been thinking of taking a class, going back to school or educating yourself somehow, today is the perfect day to start.