These are the list of doc my wife put in her file:

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 company (I asked my company to verify my employment  and asked to mention my wife name in there and I can support her living here in US)
3. I 797 - both pages (copy)
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 and transaction (This is just supporting doc. I had 13K)
9. copy of my Passport Pages (pages which have information about me and my visa)
10 ID cards copy (license / company id card )

**I also asked my wife to put her diploma and couple of certificates she achieved

11. Photo Album
Peace