I bought some second skin but I'm not really sure what to do with it.
With second skin, depending which type you have, I usually have the one you cut to size and shape, cut a piece to cover the area that has the blister or is prone to getting blisters, peel the blue plastic layer off and throw it away revealing the gel. Put the gel side on the blister area and cover with either the tape provided in the packet or strapping tape (Sports Tape). The gel will cushion existing blisters and protect the skin of blister prone areas.
your eating up those miles with your running, fantastic effort !!
Here's to a great year! 