Convert your docs into PDF’s
Something Mac users take for granted nowadays is the ability to save documents (and web pages) as PDF’s natively. That is, I can turn almost anything into a PDF because, to hear Apple tell it, that’s the "default" document format.
On Windows you’ll have to rely on the plethora of utilities out there, including Easy PDF Converter from Sowedoo software.
Easy PDF features a very simple, drag-and-drop sort of wizard-based interface for converting all manner of documents to the venerable PDF format. Including (but not limited to) Excel, Word, plain text, and PDF. Yes, there’s a need. Because Easy PDF allows you to password-protect your docs in the process. I’ve used it to lock down all manner of sensitive info when I’m working for people too cheap to buy Acrobat. All for $24 (free trial).