The important thing to remember is that it doesn't matter!
Often, when talking with people about being green, they say things like, "I don't know where to start." or "it's too overwhelming." This is when I pull out my "spectrum of green" analogy. (Special thanks to Sara L. for introducing me to this topic) If you think about it, we're all probably at least a little bit "green." Perhaps you have made some green changes to save money or you've seen some startling information that has interested you and convinced you to make some changes. Either way, you fall somewhere on the green spectrum. What I try to tell people (especially if they're overwhelmed) is that it's ok to be pea soup green for awhile. You know why? Because it's better than not caring at all. And, you'll probably change other behaviors, once you've integrated the first changes into your lifestyle enough that it doesn't even seem like a change anymore.
When I first understood the benefits of using reusable tote bags instead of disposable plastic or paper bags, I only ever remembered to put my bags in the car once in awhile. Then, eventually, not only was I remembering to put them back in the car, I was actually remembering to bring them in to the grocery store with me. Now, it's very rare that I go somewhere without my own tote bags. I can't remember the last time I accepted a plastic bag from a store-any store.
I'm not trying to brag or make you feel guilty if you're still at the "they're at home on the table" stage. What I am saying is that we all start somewhere, that change is never easy but that if you stick with it, eventually you'll come out the other end of the spectrum and never even remember being pea soup green in the first place.