I know a writer who has such a fear of writers block that when he is experiencing it, he stays away from his notebooks and typewriter because he feels he can't write anything good.
Inspiration is the answer for him. If what he is writing isn't delivered directly from the muse, he feels it is unworthy and so he does not write when he has writers block.
In my opinion, these are wasted days. There are scores of exercises to get your mind working and impart the empty page with ink again.
One way that I inspire myself to write is by listening to music. Often times it's the words of a song, and similarly the arrangement of those words that touches us in the first place. But now take a few of the words that appeal to you and write them down. Try using it as a first sentence. Or make it the midpoint of a story.
For instance: The following lyrics from The Fiery Furnaces once inspired me to write a story about the character I "saw" in the song, and what became of him.
Damp in Dumbarton dip about the 14th of May / The publican dropped me a line, thought there had been foul play / The farmer up the hill came in with his knife / He mumbled something darkly about his young wife / Riding up on the postcoach I thrummed on my notebook. (from Inspector Blancheflower on the Blueberry Boat album)
I am particularly sensitive to music and lyrics however, and quite often I use lyrics to launch writerly exercises or start the writing process.
Considering another method, take an article from a magazine or a newspaper (either at random or one you like) and a pair of scissors. Read the article for interesting possible word arrangements. Now, literally, cut them out of the story and paste them together. Many times, you will be able to write a poem, or something short, like a haiku. But at least you're writing.
A similar strategy using the newspaper or magazine article for inspiration is to write something about the article, imagining you are a character involved in the story, or a witness to it.
Assuming that doesn't work, try a bit of word jazz to find a title that inspires you to write. Choose a word, any word. You can like it, you can hate it, you can open a dictionary at random and put your finger down. However you want to choose the word you're going to use is fine.
Now write that word down the middle of the page, top to bottom. Now write one word either before or after the word you have chosen for each time you've written the word. Use adjectives, verbs, non-words, and words in another language, whatever you like, so long as you fill in each position with at least the word you chose originally and the modifier.
You might be interested to find out that this method is how Allen Ginsberg created the phrase "Hydrogen Jukebox." It comes from a verse in the poem Howl: '...listening to the crack of doom on the hydrogen jukebox...'
Another good way to beat writers block is meditation. Quieting the mind opens dams of unconscious language. A closed eye meditation is particularly good (in my opinion) for drawing out images and potential fodder for writing.
Barring these options, know that the Internet is a wonderful place to learn about what others are doing to get their creative juices flowing. A general search using the term Writing Tips yields an average 16 million articles.
If after trying any of these suggested techniques to beat writers block, and the 16 million others, you find yourself still at a loss for what to write, try reading. A lot of my personal writing fodder comes from themes in other authors' books, and sometimes from subjects I have very little background in.
Be inquisitive. Find subjects you feel strongly about. Write about them. Write about family, friends, love, hate. Write about common themes. Write about unpopular themes. Write about something you feel no one has ever written about (unlikely), but whatever you do, don't stop writing. You'll likely regret it. I would.
