I've actually found myself not using CRC or Wiggle for some time now. Smaller online shops like Tredz, Winstanley's, Shiny Bikes etc. seem to be able to out-do them on price quite often (even though the customer service can be a little bit hit and miss).
I've also found for certain things like gear cables and outers that if you root around on ebay you can find trade versions of the Jagwire kits at huge discounts - you get the same contents in a clear plastic bag with a Jagwire label in Chinese bag without the instructions or fancy packaging of the off-the-peg kits.
I try and put a reasonable proportion of my cycling spend to the LBS for things that it's not so hard to source locally or that you don't need a very specific version of.