What do you do when you wait until the last day to do your project?

It depends on what sort of project you've waited to do!

If it's a science project that will take several days to do, you've just shot yourself in the foot because there's no way you're going to get it finished. If it's a huge report with lots of research, you're probably going to get a bad grade because you won't really have time to do all the work needed on that one, either.

My advice is to do as much as you can, take the bad grade and learn from this experience -- next time, put your due date on your family calendar where you see it all the time, and start in plenty of time to finish before that date!

Have everyone in your house help you on it... and fast.