Review failures. What can you accept and continue? What failures will dictate a reversion to Cat I? When can you not accept a reversion and have to go around?
Check crew qualifications.
Check aircraft status. What unserviceabilities will remove Cat I status?
Do you need to conduct a RadAlt test? Is it desirable?
What differences between Cat I and Cat II/III in settings? Do you set RadAlt DH's? Most Cat I approaches are down to minima based upon ServoAltis, Cat II and beyond on RadAlt.
Do you switch PF/PNF for the approach? For go-around? Review and brief who will do what, who will call what, and when.
Review taxy procedures after landing. Most airports request that you call runway vacated in LVP's, and don't have to otherwise. With this in mind, review the airport plate and check where you expect to be able to vacate.
etc....