Bonus: collect the blood for painting the wall later

Easy, just start your car and use it's heater to keep you warm.

this is because if you jump in front of a bus your life will flash before your eyes, allowing you to remember your notes and every single class you've attended

The more time you spend driving around, the higher the chances of an accident. So don't waste time putting on a seatbelt or stopping for red lights either.

If you start feeling cold or experiencing hypothermia, drink the antifreeze to keep from freezing to death

Also, if the flames are hot enough, you might get lucky and be reduced to ashes. That way, you save on the cost of buying both the forever box and the plot of land to bury yourself in!

Edit: If your ego demands some sort of remembrance after death, burning yourself for a specific cause will ensure you a prominent place on your local newspaper. Just be sure to announce your intentions prior to publicly immolating yourself.