Allan Su has traveled Iceland several times and gives a really great itinerary of how to spend 2 weeks (travel during June-Sept) visiting the amazing outdoor locations of Iceland. He hits both the famous/well traveled locations as well as lesser known but amazing attractions. He also gives a great set of advice on a number of handy resources from rentals to checking weather/travel conditions.

Links:

• Northbound vehicle rental
• Vedur.is for weather
• Road.is for travel information – especially for F-road (offroad) routes. Get conditions and when they open.
• SafeTravel.is – General travel information and conditions