This is essentially a practical application of the ideas contained in my post Waking Up in Another World. First off, this is one of those practices that should only be undertaken with a lot of forethought in a clear head and emotional space. It can get weird. But it can be a useful thought exercise at any time.
Find a place out in the weather, where you can spend time undisturbed. This might take some time, or you might know a place right now. You are looking for a Gate or Door. Two trees, two stones...natural or man-made. Standing stones might be perfect if you are in the UK. For me it has always been trees. Whatever you choose, it must suggest itself as being a door or gate. Take your time to find your door, don't force it.
Once you have found your door, begin to visit it. Spend time thinking about how much of a door it is. It is clearly a door! Anyone could tell! Walk around it, if the terrain allows. Allow yourself to wonder where it goes. Think about walking through it, but do not. Feel the pull of a new world beyond the door. And go home.
You will visit your door another eight times.
The second visit, allow yourself to understand that if you were to walk through the door, everything would change. Subtly or drastically different. Think of the world you would like to be in, and how you would be in it. Allow yourself some sadness at the things that you would miss. Excitement about the change.
Allow yourself some fear. Although many things could be better beyond the door...how could you be sure? Be serious in assessing your desire to walk through the door. Is it your Will to do so, or are there things that could be done in the world you inhabit now that would make you choose to stay? Think on these things.
Think of the possibilities.
All the things that could be different.
Better or worse.
Feel the pull of the door.
A different world.
Leave a small offering to the door.
And go home.
Repeat this process until your ninth visit.
On your ninth visit you must decide: Stay? Or go?