I just use a notebook and keep notes.

Draw diagrams that work only for me, showing my Feb 2016 points being moved to 2017 and being used for Princess...showing my 2017 points going back to 2016 and being used for December 2016 trip (I don't know why we did it this way...now, unless we switch from Poly to Bay Lake if themepark view come available, we'll lose 2 points to oblivion). etc etc etc.