Since coming here? Well, the thing is... I've been working on my personal finance long before I got here. As a work in progress, I don't know precisely what was done before SavingAdvice and what was done afterwards. The site has certainly helped shape my financial life so far.
I can say that the biggest difference is with food. Prior to meeting all the Culinarily savvy ladies on here, I mostly ate out... because I'm that dumb.

After coming here, I'm boiling stuff, microwaving stuff, and am even gearing up to attempt to crockpot stuff! We'll see how that goes.
But that limited cooking alone has saved me $150 per month... or $1800 each year! That's pretty good in my book, and I look foward to reducing my overall spending even more.