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Once you have a digitized text, you need to make sure it can be read by text analysis tools. Texts formatted for the internet or a proprietary software, such as Microsoft Word, will have lots of hidden characters and encoding. Unless your text is in a plain text, .txt format, it will need to be scrubbed. The tools below can help get texts and data into a more machine-readable format.
Any project in the Digital Humanites will be significantly easier if the text or data you want to work with is already digitized. The sources below all offer collections of digitzed texts. If you have the option, go for a plain-text, .txt format.