This is the number one thing I try to teach new controllers.
Since we service the pilots it’s our job to make it as easy as is possible on them.
Every message is added work, each one should be considered to be necessary.
Limit your heading changes.
Reduce the amount of altitude changes.
Work on being correct the first time when sending commands.
If you make a mistake, make sure you’re correct the second time.
If there’s no conflict to avoid, don’t intervene.
Don’t create work for yourself.
Sending a ton of commands, making yourself busy when it’s not that busy is not always helpful. Try to send the least amount of commands as you can without sacrificing the necessary quality. It will lighten the pilot’s workload and your workload.