Cheap ways to insulate old windows

If you live in a house with double hung wooden windows you might love their classic look but not love the amount of cold air that seeps in between the upper and lower window or at the bottom of the window. I experience this problem even with the storm window in place, sometimes to the point of having frost. I wanted a way to decrease drafts without something ugly that mars the look of my windows (like foam, caulking or felt strips that always come off. I realized that if you simply take scrap paper or newspaper, tear it into strips and fold it longways two or three times (depending on the width of the gap) you can really cut down on the amount of cold air getting into your house. Simply fold so that it is perhaps a quarter inch wide. Slip into any gaps where your bare hand can feel cold air getting in including along the sill but most importantly the line between where the upper and lower parts of the window meet, where the lock usually is. You will probably find that each window needs three or four different pieces of paper because some places will be tight, some will need just a double folded piece and some require more. It seems too minor to make a difference but your house will be more comfortable, less drafty and you will save on your heating bill. Remember that one 3 foot wide window with just an 1/16th gap is the equivalent of a 2 inch square hole in the window letting in cold (if my dusty math skills are correct). The advantage to this system is it is free, uses supplies you have on hand and works. The disadvantage is that once you crack the window open in early spring... all those pieces of paper flutter out. It usually takes me less than an hour each fall to do my whole small house.