Im going away on holiday for over 3 weeks...How do i make the times with my girlfriend atm the best i can?

Im going over to Abu Dhabi to visit my dad for 3 weeks and 3 days and im going to miss my girlfriend a lot and she is going to miss me too. I was wondering if you have any ideas on how to spend the remaining week i have with her just now? I want to make it one that she will remember and really like and to get her through the time we are away from each other :/