Yesterday I wrote about using projection in my show. The key is to enhance the live action, not to replace viewing it from the stage to the screen. Basically the idea is to have the action happen live on stage and visible to the audience, but then using the screen to verify or highlight smaller details.
A good example of this would be a Signed Card to Pocket. The main props which are cards are large and can be seen in a large theater. The signature or specific card number is smaller. Having a screen to project the signed card onto will make the effect play larger.
My idea for working solo is to have a dedicated table with a camera on it and then the projector and screen. In a lot of venues I won’t need to provide the screen, as they will have one already, or I may be able to directly project the image onto a wall behind me. Projecting onto the wall as needed is the ideal situation.