Others will be along shortly to give lots & lots of practice ideas. There are a ton of things you can do in dryfire at home. You can improve trigger pull to get rid of a flinch, you can practice moving while shooting, you can practice a smooth and efficient drawstroke, you can work out how to draw safely from concealment, you can practice working around cover, you can practice shooting from unconventional positions such as while crouched behind your bed, you can practice efficiently moving through your own home ... the list goes on and on and on.
But.
Dryfire is very dangerous. (If you doubt me, please read
this thread from another forum, a compiled list of unintentional discharges and how they happened.)
For safety's sake, please read this before you dryfire:
www.corneredcat.com/Practice/dryfire.aspx
pax