google

I recently switched to gmail and have been working with the various tools for a bit now.  Google docs is helpful when you have multiple ppl contributing to a document.  They can be anywhere at anytime and access and edit something that already exists.  Its only downfall is possible information loss but you can save a backup and you can go into the history if your the documents creator and find anything that's been deleted.  As for the other google tools.  Calender is probably the most helpful and I use it and have reminders emailed to myself so I remember when assignments are due, I am meeting people, and other important things.  I recommend google calender for people with a lot going on. It is user friendly and helpful.