I think Future Pages are the unsung heroes of planners! I never used them until I learned more from Giftie. You'll see in the image below that I have punched both sides like she does so I can always have the current months facing me on the right side of the page. I have been putting items with dates on the left hand side and notes I want to remember on the right.
I made dated 2015 future pages in half size for myself and the link for those are below - they will need to be printed on 8.5 x 5.5 size paper.
There are also undated future pages available in all sizes - just write in the month and year and you are ready to go.