@Matt
No, it's good to plan ahead. Just be aware that the road from undergrad to faculty member is a long and arduous one, and it's not for everyone even though it's the end point everyone will push you toward. As Babcock-Hall said, you should get a taste for real research before you decide whether you want to go far in that direction, although in the end managing a research program is very different from doing actual research.
Here's the way I would summarize it:
Graduate student is basically tons of work for next to no pay. It's really a form of indentured servitude, and that's no exaggeration. The only difference is that you can quite when you want to.
Post-doctoral fellow is tons of work for a little more pay. Honestly though you'll be sick of making less than a lot of your friends probably made direct out of college, and this after six or so years into it. Free grad school sounds like a great idea, but you've got to balance that against lost earning potential. Salary of a post-doc ranges from about 40 grand in academia to sometimes 50-70 grand in US government if you can swing one of those.
I'd say the worst part of it is the almost total lack of career guidance. Before you do a post-doc you should have a definite idea of where you're going. And do be aware that not everyone who wants a faculty job gets one. They are extremely competitive and, at least in the beginning, even more work than what a post-doc does.
My biggest piece of advice to graduate students is to take advantage of opportunities to enrich yourself beyond your core curriculum. Take a few business classes, for example. There are lots of jobs of PhD chemists and not all of them are professors. Your PI may balk at this and you probably won't feel you have time, but it'll be well worth your investment because it'll help you see what options you have should you ultimately decide research is not for you. A friend of mine in graduate school got hired by one of the big consulting firms after he got his degree and I was like, "How the hell did you get that?" And he said he took courses in business, statistics, management and such on the side. I never knew. What a smart idea. And even if you don't decide to be a consultant, a lot of those skills will help you run a lab anyway. More professors should have those kinds of skillsets.