1) Re-evaluate your numbers.
For example, this month we got a notice that our storage unit was going up on August 1st. I looked at the notice and tossed it aside hoping to remember to ask Jarrod what we were currently paying. Of course I totally forgot and later realized it was a $30 a month increase! Whaaaaat??! Talk about inflation! We were also able to lower our electric bill budget a bit in exchange for the storage unit as our current house is smaller than our old one and the bills have been consistently lower. Tracking those changes will allow you to have a current and up to date idea of what your monthly numbers should be.