A while ago I started using the “Getting things done” methodology with TiddlyWiki based solutions. I started with MonkeyGTD, then switched to d-cubed, converting my accumulated data manually at that time.
Convert your PDF files, ebooks from other readers or just plain text to the ePub format. This format is known by most ebook readers. Upload a file or provide a URL and click on "Convert file". Optionally you can select the target reader to allow our ebook converter a better accuracy.