Fuse location questions, and an electrical tip

First question, the in car fuses, can anyone point me to a location that would have what fuse if for what? I blew a fuse tonight, but have no clue what it is for, i dont have an owner manual.

Now for the hint, the small ground wire, from the neg. on the battery to your core support is VERY important, if it is a bad connection, you will have all sorts of issues. That is all