Some of the top-rated suggestions relate to removing the "use it or lose it" nature of current agency appropriations. Because they are generally for one year at a time, agencies feel the need to use the funds, even if they waste them on unneeded items, rather than face their future funds being cut. Unfortunately, appropriations are controlled by the Constitution, a set of laws and ultimately by Congress, so the ideas presented cannot be enacted on a whim.
A good way to counteract this short-term mentality is to extend the lives of each appropriation. Therefore, start appropriating agency funds over multiple years (i.e., multi-year appropriations) or make them "available until expended" (i.e., no-year appropriations). This will legally allow the suggestions to be implemented, and will have the same effect as "rolling over unused funds".