Plan your daily routes the evening before so you know which attractions or roads you want to cover. This helps you make the most of daylight hours and avoid unnecessary backtracking.
Fill up fuel at convenient times rather than waiting until your tank is nearly empty, especially if you're heading to more remote areas. Check your rental agreement for fuel policies before you depart.
Keep your driving documents with you at all times, including your rental agreement, insurance details, and a copy of your driving licence.