This tool should go without saying. But if I have to explain — you need this tool. I use it 24/7 — literally. Dropbox is where I store my personal & business related data. It’s accessible anywhere, and regularly backs up my important information.
Because my data is accessible anywhere, Dropbox allows me to work on a client project at home, on the bus, in a coffee shop, or at a friend’s house. It’s truly a gem of a tool, and I think you’ll believe me.