Well, when doing woodworking you really do want to have something more than just a mask dealing with fine dust. Lots of folks ignore it but the long term risks to your lungs make it worth considering some kind of recirculating filter. If not that at least a dust collector (not just a shopvac) attached to the tools or worktable.
When I was younger, I just laughed this off. But after reading too many testimonials of people who have gotten COPD or some other fatal lung disease from prolonged exposure to something as seemingly benign as wood dust, my opinion has changed completely.
Over the past few years, I have purchased a number of tools and supplies from a retired wood shop teacher. Guess what disease he has? It's going to do him in eventually.
Any particulate matter small enough to get deep into your lung tissue never comes back out. That eventually causes damage and potentially disease, years later.
I'll get off the soapbox now, but if this makes one person think about using a respirator or getting a proper dust removal system, then it's worth it. And as stated above, those inexpensive "dust" masks that most people wear aren't good enough because they don't completely to your face and thus leak too much dirty air.
Hearing protection and a good respirator, and you're good to go. You can get a decent respirator for $40-60 (and up) at the local box store.