On the way to Disneyland I ran in to a drug store and bought some gel insoles. I have been wanting to buy them for a while now but was concerned that they might not be allowed through airport security. Well, I'm happy to say that they weren't confiscated and I got to bring them home. They were a life-saver (or I should say a knee-saver) at Disneyland. My knees were bothering me before I went to Disney and after a whole day of walking with the insoles, my knees didn't bother me at all. It was definitely worth the $12.
I switched the insoles out of my sneakers and put them in my work shoes today. Ah...much better.
Now I can switch the insoles between all of my shoes (well, they might look a little strange with my sandals) and put off buying new shoes for a little longer..