practice indoors

For the past two months i have made a point of spending some time on my chipping and lobs in my backyard and one night for two to three hours on the practice fairway after work. This long term practice routine has paid off and i have dropped my handicap from 9.7 to 8.1 in the past 4 rounds. Unfortunately daylight saving finishes this weekend in Australia and i am concerned that my improvement will stopor slide the other way. I will no longer be able to keep this routine as it will be to dark. What do you suggest i can do indoors apart from mirror work that will allow me to keep my game at its current level or continual improvement (drills etc.)