Individual tipping is not customary in Fiji but you will probably see receptacles at the resorts for the Staff Christmas Fund. This is shared among resort staff, so a small contribution to that would be welcome. Depending upon your length of stay and personal experience while at the resort, about FJ$20-30 would be appropriate.

If you feel someone did a particularly good job (restaurant, housekeeping, etc.) one or two Fiji Dollars is sufficient but not expected.