If you already have a KiwiSaver account set up, you can make voluntary one-off or regular contributions while you're away (although these contributions made from abroad won't qualify for the government member tax credits).
Got a student loan? Make sure you're up to speed with the repayment rules and how interest is calculated.
If you've built up retirement savings overseas you may be able to transfer these into a KiwiSaver scheme. It's important to research the details involved as various rules, fees and taxes may apply.
If settling down and buying a house is part of the plan, have a look at our first home buyer's guide and see what your repayments might be.