My two cents observation but which i have seen Works:
If your wife becomes too nagging,self-absorbed and outrightly stubborn,throw her out(even though in your mind you really still need her ).The time spent away from her matrimonial home and bed will make her really think twice about her previous actions and behaviour.The soul-searching when away will bring forth a changed wife and you will be shocked by this change when you eventually tell her 'i'm giving you another chance and you can move back in'.I've seen it work wonders.Kweli dawa ya mabibi probleme..

rather cry inside a lamborgini,than laugh inside a Startlet