My wife put these documents :
1. Letter from me (I wrote a letter to US embassy stating that she is my wife and please issue H4 visa for her )
2. Employment verification letter from my company (I asked company to mention my wife name in there and I can support her living here in US)
3. I 797 (H1 approval letter) - 2 pages (I sent the copy) (I asked US embassy in email if I have to send original, they said copy is fine)
4. Document package from the Lawyer (this inlude LCA / I129, whatever it has)
5. Marriage Certificate (govt)
6. Wedding Invitation cards - Both sides if you have any
7. Pay-stubs - couple of recent one
8. Bank Balance (I had 13K)
9. my Passport Pages (which have information about me and visa)
I also asked my wife to put her diploma and couple of certificates she achieved
10. Photo Album (Not in the file)