Seven
Bill ransacks his house and finds every single thing he had ever given him, packs them up into boxes and throws them into his attic, trying to erase him from his memory.
Six
Charlie doesn't talk to his family for months, engrossing himself in his work and pretending that the only family he has is the dragons, because dragons can't tell you they love you, so it doesn't hurt as much when they leave.
Five
Percy takes his first ever drink of Firewhiskey and discovers that one sip isn't enough, and one drink isn't enough, and so he drinks until he's convinced himself that he's Percy Weatherby and has no connection to the Weasley family whatsoever.
Four
George smashes every mirror in the house so he never has to see his reflection, because he doesn't think he can stand it.
Three
Ron doesn't speak in sentences for who knows how long, just small, monosyllabic words, and for a while Harry and Hermione forget what his voice sounds like.
Two
Ginny sits on his bed and sobs for thirteen hours straight until she can't breath and eventually Harry casts a sleeping spell on her so she doesn't choke to death on her sobs.
One
Fred doesn't know where he is, but looking down he cries over the death of his family.
I don't know if it's possible to sob for thirteen hours straight- I've never done it. If it's not, well, Ginny can do anything. So there.