It is important to ensure that your data is safe. Possibly the best method is to keep local data backups on external HDDs. But not everybody has this ability, and even keeping a local copy is not always enough. Sometimes you will need access to files from the office or other computers which you use on a daily basis.
I think a really solid option is to move into cloud-based online data backups. This works out so great because you can access files from any Operating System including Windows, Linux, and Mac OS X. The biggest factor is recognizing how much space you will need, and this greatly depends on your own needs. As an example, videos will require more external storage space than documents or website files.
