A lot of the things that I do because they are sustainable I do more because they are easier for me, with an added bonus of being sustainable.
For instance, joining my local CSA helps me eat my veggies, but also helps with keeping my produce local. It’s also fairly economical and forces me to try new things and eat old favorites.
Using the bus system instead of driving allows me to cut out the cost of insurance, gas and upkeep on said car; it also allows my mom to continue driving it until I need it (at which time she’ll buy a new one, maybe).
Bringing my own bags to the store helps me (attempt) to limit my spending so that my arms don’t fall off while waiting for the bus. Others benefit, too: my bags are cool-looking. :P
I buy things, especially jeans, second-hand, so I don’t have to pay full price or break them in. I also buy other things second-hand, especially work clothes and older t-shirts. (I found an awesome kid’s Quidditch tee for about $1 that fits me just fine…) Although I have been known to spend ~$50 on second-hand clothes in one trip, that would be the cost of one pair of Gap jeans. For that, I was able to buy the Gap jeans, several black button-downs (brands like Old Navy, Express and NY&Co), and a few LS tees (including some Calvin Klein and more Old Navy). Not bad.
This makes me sound like a fashion plate. Poo. In reality, I like to get the more “pricey” brands because, from experience, they last longer, both in holding their shape and holding up to general wear & tear. Most of the items aren’t labeled conspicuously, though. Yay!