I've focused my revision on:
Shapes and intermolecular forces
Alkene properties and reactions
Electrophilic addition mechanisms
Nucleophilic addition/substitution (Not likely to be substitution since I think that came up in last year's paper)
Oxidation of alcohols
Ionic structure and bonding
Group 7 trends
Group 2 trends
Periodicity within period 3
Stereoisomerism
Hess' Law
Good luck with your exam!