Suffering from writers block

So since I was a kid I always had a special world I imagined about. Somewhere I could control everything and weave stories and adventures to their completion. Whenever I have a writing block I go back to that world and just start up where I had left off before. Something familiar that I KNOW, something that doesn't take any real effort to expound on. Forget about rules, cliche's, and logic, I just mess around in my own mind with events and stories that just seem fun.
I would try and do something similar, forget about any pressure from players or friends, and just screw around like you were playing a video game. That is what I do.

You will help yourself a great deal if you can identify the cause of your writer's block before you seek solutions. What was going on in your life around the time it set in? What was your emotional state then? Have conditions changed much since? These aren't questions you need to answer here, but might point you toward the cause.

Depression is a major source of writer's block. If you feel like other areas of your life are suffering as well, see a therapist if you can afford to, and consider anti-depressants.

Sometimes its just stress without depression. Try to reduce sources of stress, and writing may come easier.

Sometimes there's other subconscious detritus between yourself and your intended audience, whether they are people you know or the anonymous public. In either case, your subconscious mind is nigh impossible to access on your own, but it may help to take a critical, open, and honest look at your relationship with them. Abandon the expectations you place upon your audience. Write only for yourself, but always with the intent to share with others.

There are many other causes and corresponding solutions. However, one of the most helpful, general pieces of advice I received is to just write something, anything. You aren't obligated to share it with anyone. I don't mean to contradict what I wrote at the end of the previous paragraph. The purpose of this kind of writing is to power through the block, even if the product is blunt-force lameness. It can be any length and style, on any topic you want. Trash it when you're done if you don't like it.

It's all well and good to seek inspiration in the creative works of others, but I've never found it reliable for overcoming my own stoppages. There's one thing I'm definitely not doing when I'm reading a book or watching a movie, and that's writing. Sometimes you just have to force yourself to do it, or let someone else force you. To that end, almarianknight made an excellent suggestion, and it's your new writing assignment for these forums: contribute to a DM-nastic of your choice. I suggest #20: Heroes for Hire. It recently reappeared on the front page, plus its one of my favorites.