It can be really, really hard making the transition (and hard on your checking account too, since some 'natural' clothing is a lot more expensive than even name brand!).
Here's a few suggestions that might help:
*Shop at thrift stores/garage sales for clothing. Even if the label says "made in the USA", it doesn't guarantee it's "sweat free". If you buy used clothing, you're not contributing to those companies' profits, you're supporting a "little guy" (consignment/thrift shop owner, or private seller), and you're keeping stuff out of the garbage dump. So....you might still find your GAP jeans on occasion, but you're doing it mindfully.
*Buy local when possible. Some areas are easier to do this in than others. This is particularly important with food. It's been fun/interesting/educational to "eat with the seasons" for us, and another way of mindful living/consuming.
*Try your hand at making as many of your cleaning products as possible. You're not buying extra packaging if you do that (just reuse your old containers--like for Windex, ect.) and when you do need the harsher stuff (and potentially the things that are petroleum byproducts), you've counterbalanced that a LOT.
*Strive for baby steps and consciousness, NOT perfection. You won't be able to eliminate all the bad stuff (sad to say, but even most vegans will end up eating SOMETHING from ConAgra or Monsantos, it's almost unavoidable). So don't drive yourself crazy or do it out of guilt. One level at a time, until it's easy and you're ready to add another. You are making a difference even by doing a little bit, and will be doing even more as you 'advance'.
Others might disagree with me, but I'd say start with the 'easy' stuff and make that a habit first. Clothing tends to be easy since we normally don't have to buy a lot of it all the time. Cleaning products too, since even the 'good' brands like SG can stand a little watering down and still be effective. Pick one 'area' and research it at a time...soon it'll be second hand for you to have your red flags raised even in other areas.