Tighten up at the back
This one is the clearest of them all.
Our defence was shambolic and leaky last week but perhaps we can put that down to a bad day at the office or the sheer brilliance of Romelu Lukaku?
Against a lesser opposition in Southampton, a clean sheet would boost the Hammers’ confidence a lot.
Whether Bilic shores the defence up by changing personnel (Cresswell, Byram, Fonte or Collins could come in) or by changing formation is up to him.