1) I live at home with my parents, so I don't have to worry about rent
2) My company provides free lunch every day, so I don't have to spend money. However, I have a bad habit of buying muffins and bagels at the neighborhood coffeeshop for breakfast and those can add up...in terms of money and pounds! I've controlled this by buying a box or 2 of cereal and bringing it to work.
3) I take public transport everywhere and/or walk
4) I catch up on all my news and magazines online! By the time the same stories get published on paper, I've already read it.
5) I get manis and pedis as a once-in-a-while treat rather than regularly.
6) I get haircuts no more than 3 times a year...I choose a simple style of cut that looks good while it grows out. I also avoid damage to my hair by not blow-drying or using hair dye.
7) I, too, am a bargain huntress! I go to Loehmann's, Marshalls, and Target for basics and bargain shoes. For the really high end stuff, I wait for the big department store sales, both in the store and online. However, this is also where I get caught up with spending...I find a really spectacular piece that is deeply discounted, but I don't end up wearing it because it is *too* (insert negative adjective here!).
and the #1 tip I can give is to STAY HOME! Almost anything you do outside of the house requires spending money...if you stay home you're less inclined to spend money...although you can still do shopping on the internet, I get more pleasure just browsing online stores than buying from them...