Scream

Scream by ~mtarantola on deviantART

Self-Timer

Self-timer offer the chance to be your own model so you can experiment new concept and idea otherwise hard to work with.
Learning to work with a model can be difficult and can limit your creativity, but a self-timer and a couple of little tricks can let you explore your full potential.
All you need is a digital camera with a self-timer of at least ten seconds and a good support like a tripod.
Start finding two different point: the placement of the model (you) and the placement of the camera.
Where you want to place the model you need to find some reference point to help you with composition and model positioning.
In order to focus properly, especially when you need a short depth of field, you may need to use an object as a reference.
When you are confident with camera and model positioning, do some shots just to verify composition, light and focus.
I suggest to partition the whole process into two different phase: first shot without model, so you can set every parameter properly and start to be inspired by the scenario.
Then think to the model part of the problem, how to dress, how to pose, expression, etc…
If you aren’t in a studio, the whole scenario can suggest you the right direction, so carefully observe light and composition looking for inspiration.
If your camera has the image display function, set a 3 second display after shooting so you can easly check the result and decide the next step.
Being alone will let you experiment different and extreme solution, and then delete the unsatisfactory result.
When you have set everything properly and find the concept, start the session setting the self timer, positionig yourself as a model and check the result: repeat several time and have fun !