How to not forget where you kept your keys. How to not forget paying any particular bill.
Now this is what most people do,
They keep the keys in the same place everyday, some place easily in sight while on the move.
They either pay it as soon as the bill arrives or keep a particular day of the month for paying bills.
The first one is the most effective because it almost always works. The second one is contingent upon our disposition to do the earlier assigned work right away.
Almost always its the process which is at fault and not people!