If you have a pre-2017 investment property deduct hard on the plant and depreciation - better to wipe down your income now (and pay 1/2 of it back in CGT when you sell).
Remember that any vehicle can be a business vehicle - just need to follow the 12 week logbook method and after that you can apportion all vehicle expenses - this includes extra servicing and costly consumables if you happen to also use that car for, say, track days.
Family trusts, if you have a lower earning spouse and/or adult children.
If your partner wants to do some work for you (e.g. book-keeping), nothing stopping you from paying him/her a reasonably healthy market rate and that way splitting off some of your business profit. Better give that $40/hr of book-keeping to your partner than some person out there who's not an intimate relation.