I splurge on skincare (Dermalogica) and save on make-up (there's an Aussie brand called DB which I love ... I find many of the products comparable to Estee Lauder, which I used to buy).
Before Dermalogica, I tried Clarins, Ren, Estee Lauder, Dr Haushka, Origins ... so many. But I just bought into the hype without getting a proper skin consultation done. Earlier this year I went to get a facial at a Dermalogica salon and they did a face mapping for me, which showed what I needed. I was so impressed when, saying to the therapist that I would just take a cleanser and toner to begin with, she gave me a huge wad of samples for all the other products that this face mapping suggested I needed. After working through the samples and realising the benefit fairly quickly, I invested in the full size versions which were veeeery expensive ... but worth it. I just wish the products smelt lovely like Ren or Clarins - I'm a sucker for a lovely scent.
Despite the cost of the initial outlay, the products are actually lasting a really long time, and my skin has never been better. I especially love the concept of double cleansing.