So Many Decisions

So, what is it about having children that suddenly makes us view the world with entirely different eyes? We start worrying about things like retirement funds, savings accounts, pollution, global warming...just to name a few. Before we had kids we did what we wanted, when we wanted, with no real thought to the long-term consequences. Since having our two children: a daughter who is 2 1/2 and our son who is almost 10 months, it seems like every decision is made with such intense scrutiny that the pressure is almost too much. Are we over thinking things? I want to hear your thoughts. How has your decision making process changed since having children?