I'm only 25 so I'm in the same money boat as you. I'm out of college, but student loans and the salary of a post-college job (plus the financial aspects of thinking ahead for grad school) sure do make money management important.
My solution is just to not buy that many. My birthday is Tuesday and I'll be buying 3 or 4 (or more) bottles because I don't really know what I want except clothes and fragrance. So as a reward for staying alive another year, I'll put in $200 or so as wardrobe maintenance. I'll buy some more at Christmas.
There's no way I would ever buy more than one expensive bottle or two cheap bottles per month. Most months I manage to not buy anything. I just get a lot of satisfaction from smelling, so samples are a good solution for me. I'm going to buy a few sets of samples at www.aedes.com for my birthday as well. It's fun to buy 5 or 10 samples of the same note (different vetivers) or a variety of fragrances from a house like MPG to see which one(s) is your favorite. And they're 7 for $15 so it's not too much of a bankbreaker. I usually get a good amount of wear from each sample vial - I wore MPG Baime every day for 2 weeks and used just a little more than half of a common glass vial.