many people get by just fine running 87 octane. I won't run anything less than 92 octane in either of my SHOs. Octane Booster and all that won't make a damn bit of difference...at all....unless you dump about 2 gallons of the stuff in it. Don't even bother with a half tank...go less....1/4 should be more than plenty.
Powershift at your own risk...chances are, if you can even get it to powershift (mine never has), you'll shatter a motor mount, clutch, half shaft or diff pin.
Clean all the crap out of your car that you're not using (i.e. trash, loose change, the dead ****** in the trunk, spare tire and jack, sub enclosure if you have one). More'n likely, you're like me with about 30 extra pounds of trash floating around your car.
Don't worry about pulling the back seat...it weighs like 10lbs anyway...won't make a lick of difference. If you have a power passenger seat, on the other hand, that **** weighs about 65...go ahead and pull it.
Pull off your center caps and make sure your lug nuts are tight (can't run the track with center caps in place anyway). Make sure your battery is down good and snug, and make sure you got full oil (don't listen to the guys saying running a quart low helps...the crank doesn't touch the oil in the pan).
Drop your tire pressure to about 20psi in the front and as high as you dare in the rear (50-60psi) to reduce rolling resistance. DON'T DO A BURNOUT IF YOU'RE ON STREET TIRES!!!!! Avoid the water box altogether. Burnouts on street tires just tear up chunks of the track and ruin it for the guys who actually mean business sporting slicks. Roll around the water box and do a hard first gear acceleration to clean the tires off....street tires won't heat up enough to make destroying the track worthwhile.
Aside from that, it's trial and error to find launch points and shift points. Every car is different. Just don't get frustrated if you run mid 15s or worse....everyone's first time sucks with few exceptions.
Did I forget anything?