You need to do more than just shake on the deal; you need to get it all in writing. It doesn’t matter how much you like the person you’re dealing with, how in sync you are, or even the way you finish each other’s sentences—Venus will still be squaring Uranus in your solar house of finances on December 28th. That could result in a surprise about-face or no-show right when you’re ready to finalize matters. Venus/Uranus squares are famous for broken promises, which is why you want to make sure that you’ve got everything in writing beforehand. Better to be safe than sorry.