After the party my folkdance-group threw last Saturday, I must have forgotten afterwards to stretch my foot muscles enough.
Which meant that come Monday, the rest of my body felt okay, but... my feet and calves were in a terrible condition. Especially after Monday's 3 hours long tango practice. Auch.
So after I'd gotten home, I took a quick shower and then spent a blissful hour sitting on our couch, thoroughly enjoying a foot-bath. You wouldn't have been able to lure me away, it was so heavenly. It didn't work out all the kinks in my feet, but it came pretty close. Sleeping the rest of the night with a heating pad filled with wheat kernels also kinda helped.
Conclusion: must remember to stretch muscles more often.