I went ahead and put together some gfycats of the types of things I do when I sit around in the training mode for Overwatch. The different heroes I used here all require some different kinds of motions, and this is all very easy to do in training mode because the bots have massive hitboxes. This all types of stuff you should be able to do on the training bots without thinking too hard about at some point. I'll just cycle through heroes and do this for a bit every now and then, then force myself to go for the motions in random QP or DM games.
Soldier tracking (this is kinda shitty but you get the idea)
McCree flicking
Tracer target finding
Genji doing wider sweeping motions
Doing Widow stuff
Just gonna quote you so you can see this and get an idea what I do. You prolly can't just whip things like that yet, but just practice those types of motions in training room sometimes. What I posted is something I would expect any reasonable Diamond~ or so DPS player to be able to do without thinking about it. It's all pretty simple cause the training bot hitboxes are like 5x the size of somebody's head. Just good to practice like that.