Step 1: Log into Google Docs. However you normally do that.
Step 2: Next to create is a drive type looking button. Click there and go to Files...
Step 3: Select the document you want to import. PDF or whichever should work. I personally have had more success with PDF's though.
Step 4: I always just start upload. I have found if I covert anything it messes with the document itself.
Step 5: The document should appear. (The one I am working with was the Donation Letter I use.) Double click on the document to change the settings.
Step 6: In the upper left hand corner is a blue share button. Click there (otherwise you will be the only one who can see the document.)
Step 7: Where it says "Private - Only the people listed below can access." You want to change that.
Step 8: Public on the web makes it so everyone can see it. Anyone with link is literally anyone with the link. I like to choose this option (makes me feel like it's exclusive for my blog readers.) Click save.
Step 9: This box will appear when you change the setting from Private. The code listed is the code you give people or place in your post or link to an image. Click done.
Step 10: Success! =)
It's fairly simple once you get the hang of it. =)