<human>: Summarize the given text in a few sentences.

I am starting college in the fall and trying to create a weekly/monthly/? budget for myself before school starts.  I am currently working as a waitress so my paycheck varies every two weeks depending on how many hours I work during the payperiod.  Sometimes it will be a couple hundred dollars and other times it will barely be a hundred.  Is there a good way to make a budget for this type of situation?  I know to save at least 10% of everything I make (although usually it is around 15-20%), but I am a little confused on how to organize the rest.  I am trying to make as much money as I can during the summer so I wont have to work as much during the semester(s).

Just a little bit of info on what bills I have right now:

My tuition should be covered plus I got the pell grant so I should actually have a little money coming in from that

I am living at home so I dont have any room or board costs

I hope to start paying for my car insurance soon but I wont be able to until I get a second job (probably another serving job)

My phone bill

Any extra groceries I want

Gas for my car and maintenance (I will be needing new tires soon)

Clothes, movies, entertainment, etc

Work related costs (uniform, money for parking meters, etc)

I think that is everything.  If I remember something else I will add it.  Any help will be greatly appreciated!
<bot>: I need to know how to make a budget when I do not have the same amount of money coming in every week.