One of the easiest ways of sharing documents is Google Docs. Google Docs allows you to share any number of documents among groups of people. We've found that it's an easy way to manage apartment life. If you have roommates, it's a great way to make a budget, schedule tasks and chores, and make lists that each roommate can edit.
The first use that we have found for Google Docs is managing the household shared expenses between roommates. We've used this ourselves and found that using a simple spreadsheet shared among roommates works really well. Rent, utilities, cable and internet bills can be split up easily, without any fuss. If you don't have any roommates and you want to create a budget to be shared with your parents, than you can also use Google Docs. Most students' parents contribute something toward their expenses. Having a shared spreadsheet is the easiest way of seeing this budget.
The second use we could find is managing common shopping lists. In most apartments, there are some items that roommates will share, like milk, olive oil, canned food, tissue and toilet paper, etc. It's a really good to have this information shared in another spreadsheet that's available to everyone involved instead of just putting a list on the fridge. This makes it impossible to forget because almost everyone has a Google account to log into their Gmail.
The last use that we divined is to divide up the household chores. We know that it's probably something that you'd like to forget, but there is nothing like living in a nice and clean place. That's why if all roommates participate in cleaning, it gets done quicker and easier, no fuss, no muss. And if you are on the go, you can use Google Mobile to access Google Docs to see the lists and tasks.