If you want to create direct links to Google documents (documents, spreadsheets, presentations, etc.) created in Google Drive, download them to your computer before uploading them back to Google Drive.
Make sure your file's visibility in Google Drive is set to "Anyone with the link". If it's set to "Restricted", only people who are logged into Google and granted access to the file can open the direct link (which is probably not what you want).
This only applies to uploaded files, not documents created in Google Docs/Sheets/Slides.
If your file is very large, the direct link may first open a page stating that the file is too large for Google to scan for viruses. The page will have a button to download the file.
Google Drive Direct Link Generator Tool
Tool for create direct download for your Google Drive files
Google Drive share link example:
https://drive.google.com/file/d/0Bz4YdwRI3rnCMFRoTmtSS0M1VHM/view?usp=sharing