So, one of the keys to keeping dust down is to actually do "Something" to collect it. My problem is I get tired of moving the shop vac hose or DC host from machine to machine. My Miter saw is on a moveable base, so it likes to spray dust anywhere behind it. The particular saw I have has a little chute right behind the blade that you can hook a small vac hose to.
So I picked up 'buckethead' at HD for 19.97 and use one of those 'i-socket' switches to turn the vac on whenever I use the Miter saw. I was amazed at how well it actually works. Used it a bunch yesterday and there was very little dust anywhere. I liked it so much, I'm going to dedicate the Bucket head and I-socket to the mitersaw, permanently.
Very little dust going anywhere...