Ok so you get the idea. So how does one go from washing everyday to just a couple of times per week. Well first, start off by going every other day and on the day you don't wash you can try using a dry shampoo like this Rene Furterer one
or if you're real cheap you can try baby powder, but use sparingly so you don't get white roots. Try it for 2 weeks if things don't improve after 2 weeks then you might be in the minority of people who really do have oily hair. If things get better after 2 weeks then try going longer. I know how you feel. I was a daily washer until I went to beauty school. Now I wash when I can't remember the last time I washed my hair was. Good luck!