I am wondering if you have gotten an official diagnosis yet. Usually, 2 years old is too young to determine if it is ADHD or just part of being a little boy. I have family members with ADHD, and majored in human development, and my experience through both is that you can't really diagnose for a couple more years - even if both you and your husband have ADD/ADHD.
Yes, you want to be proactive. Teach him skills to help him settle down. Avoid overstimulation. Help him find interests to focus on (ADHD is really more of a misplaced attentioon than a lack of it, and the overactive can stem from that). All of these will help him, especially if he does end up with ADHD.
I am not completely opposed to medication (they have so much better stuff now than 20 years ago) but I think that it is important to do all the behavior modification/training first and not medicate unless it is really neccessary.
My daughter is 10 and probably has mild ADD. My son is 7 1/2 and probably has ADHD (I haven't had any diagnoses yet, and I don't care to if it's not neccessary - why pigeon-hole them when I can do a lot myself to help). So if you ever want to chat or ask questions or get support, you can e-mail me: ____@____.com.