Here is a practice routine I used for many years and did an advanced article on it for Archer's Bible.
(I had seven 3-D targets but it can be done with less.)
Each target is a different randoom distance and angle. To begin, jog at a fast clip around the entire range. Stop when a helper yells "Stop". Shoot one time at whatever target number the helper calls out. Continue jogging, repeat process.
With one target, jog in random circles. One of your kids or any person calls out a number. Stop and shoot then continue jogging.
Most Effective Practice for Hunting.
Place one arrow at back door or whatever door you exit to shoot. Walk to a random distance and shoot that one arrow. You are done for the day. Rather than walk to a random distance, I had the kids move my targets every night and not tell me what distance. You may also do this once each morning and evening.
I often shot out the back door while still in my underwear. Obviously, I pulled the arrow later. You must resist the temptation to shoot more than once. Live game does not give you that option. This above all else is the best practice for hunting I have ever come across. Also, since I shot from a seated position most of the time, I usually shot from a chair in the doorway.
Through all my years of shooting a bow, I found no advantage from shooting from an elevated platform during practice. If you do, then I suggest you do so.
However, by far, the single best way to relieve boredom is to shoot with someone for nickels or dimes per shot.