Sorry to hear about your loss. Im new to the board so obviously I dont know about anything past on here but I wouldnt even want to think about how much its going to stink the day my dad passes on.
The only experience I can even compare was when my best friend died in a waverunner accident. He was 20 at the time. The best thing I can tell you is what I've discovered since the day my friend pased on 6 years ago is that people only really die in their physical form but that their dreams and memories live vicariously through your recollection of them. I get through a lot of rough days this way. In this respect you can always keep your dad with you.