Hi -- I need some help!

I am trying to replace an old electrical outlet in my home, because
it's so loose that plugs barely hold in the outlet. I turned off the
power, unscrewed the outlet, and removed the wires, but I made the
mistake of not labeling the wires before taking them out. Now I am
stuck, because there are a total a 7 wires coming out of the outlet
--- 3 sets of black/white wires and one bare (ground) wire. I don't
know where to connect each wire! This is the first time that I'm
trying to replace an outlet, and this configuration doesn't make any
sense to me. Can somebody help?

Thanks,

Will C.