When feeling worn out, rotate
If you can be restored from simply doing a different task, then its not real burnout.As someone who has undergone real burnout from burning the candle at both ends for to long, I wish it was this simple. Its sometimes called a mental or nervous breakdown, and the only real solution is to disconnect from everything you can (hard to disconnect from kids), and just try to get back to a stable place. For me that was living in a Costa Rica for 3 months with no TV and spotty  slow internet.  The only thing you can do is sit on the veranda and relax.