For claiming work related motor vehicle expense (log book method):

Maintain a log book recording the petrol expenses
Receipts for expenses such as services, repairs, tyres maintenance etc.,
Home to work and return travel is generally not claimable except in certain circumstances. Travel between jobs on the same day and travel for work (i.e. visiting clients, doing pick-ups or deliveries) would be claimable. While using public transport, keep all receipts and/or diary records/log book. If you use your own car then you need to keep a record of all business mileage travel. You should also record expenses of the car including petrol, repairs, registration, insurance and interest on a car loan.
Credit card slip /Bpay/ email receipts having information like date, supplier, nature of the goods and the amount is accepted as a receipt.
Documentary evidence should be kept for five years from the date of lodgement of the tax return in which the claims are made.
Maintain records/receipts with regard to the expenses incurred in replacing, insuring and repairing tools and equipment of trade that are used as your main income for claiming expenditure
Only study directly related to your current job may be claimed as a self-education expense. (however, an education expense that gets you a New Role / Job is cannot be treated as Self Education Expense).