A few years ago I used to run around with an USB-Stick for my projects: if I worked at my office I copied the files at the end of the day and took them with me to keep working on the project at home or at my other office. Getting tired of that (especially of me forgetting to copy all the files or taking the stick with me) I changed to a synchronization software that kept my files at the same state everywhere I worked. That was a great improvement, although it did not solve my second problem: Keeping track