I do anticipate, however, I never do it in code. Rather, I find that just thinking through some scenarios helps me to see where the code might start evolving, and to make sure that that part of the code is isolated enough to change without having to change everything else, if the time ever comes.

(Perhaps Nathan includes this in his "make it beautiful" phase, but I felt it deserved to be made explicit. I've too often heard YAGNI used as an excuse to not even think about a problem, let alone code for it.)