Moving out?

I am moving out from my parents house to a one bedroom apartment in Southern California. I was trying to make a budget and see what my expenses were going to be. I’m sure that there are little things that I will forget to budget for due to not having experience of paying for these things. My rent, school and fuel expense are not included in this budget because they are already paid for. My current list includes:

1. Utilities ( Electric, gas, water, trash) $100 per month
2. Groceries $400 per month (two adults)
3. Cable ( Internet & TV) $ 60

I’m sure I didn’t account for some expenses or didn’t estimate properly so please feel free to make corrections or suggestions. Also I would like to create an organized way of keeping track of all my expenses i.e spreadsheet. If you have a good system or tool that helps you keep you organized that would be helpful.