If I found out I had a week to live I'd be pretty upset.. but I'd grab at
least an ounce of bud first off.
Fill up the car with gas and for the first few days I would want to be with my 3 good buddies somewhere fun, be it at one of their houses hanging out and kicking back (rich mofos) or even just on the road. Maybe a 3 day beach trip just blazing and enjoying everything. Hit up one last club.
The next day I would get up early and spend it with my close family. Cook them lunch, watch some home videos, reminisce of the good times... maybe a camp fire at dusk. Watch some movies and make tea sounds good. No blazing this day except at night.
I think for the rest of the time I would want to be alone. I'd write up a will and leave my town for the last time. I think it would be fun to try and get a 'test drive' for a corvette or an STI. Take it and go on a solo journey to where ever I feel like at the time, and ultimately the place I want to die. Maybe like, somewhere in Northern Canada... or if I'm feeling up the the drive I could make it to California so I could spend my last 1-2 day seeing Cali and whatnot. Maybe I could find some nice Cali bud, although I plan on having some left still from before. The drive down would be a big part in my time alone... play my favourite music and really reflect back on my life.
That's the plan off the top of my head... there are so many small things I want to do still that I'd have to squeeze in there somewhere