My more recent crash was about a month ago and I took 2 and a half weeks off from riding, mostly because of rain and some thigh pain, then it became some reluctance or rather lack of interest on my part. I've resolved all of these and am riding regularly again. What I didn't do after the last crash was to inspect my helmet thoroughly and today after reading through a helmet thread in Bikeforums, I decided I should do just that.
Boy was I surprised, I found a section of foam near the strap had cracked completely through. There was only one thing to do, replace it. So I did just that and I rode down to the Performance store down in Sorrento valley and dropped 53 bucks on a new one during my lunch hour (then put in a good climbing workout). Granted I was taking a chance by having the broken one on my head to begin with, but something is always better than nothing and something new is certainly better than something that is broken.
But the bottom line is that in both incidences I was glad to have had on a helmet, as my head solidly hit the pavement on both occasions and during the second crash my head slid along the railroad track crossing for a few feet. And for a very nominal investment one can significantly protect one's head and the contents within. I have had debates with a certain