So, I make an excel document and make a couple of different sections. I start with my income section and I put down my main job which is coaching my summer swim team. I list the hours worked, the amount per hour, taxes and then on the right side I put the total money earned and how much I get on my checks. I also put what the check covered. This is important because, for example, my next check covers the last week of May and the first week of June. I then make another column that is other income. I take that check amount and the other income column and using the excel function (great tutorials on this, just google!) summation and add it all up. I also report every expense  (only ate out once this month without my family, pretty proud), sum those up and then deduct that from my income. I find the net money I saved after that.  Being in control of my budget like this really makes me appreciate the value of the dollar. For any college or high school student working with a sort of limited income and limited expenses, I would recommend something simple like an excel spreadsheet. 

I also keep track in my planner the number of hours I worked that week and expenses. I find that putting these things down twice really help me mark exactly how much I am saving and how much I am working. Here is an example of a blank spreadsheet I set up every month before I input my earnings and expenses.