When you have nothing better to do, burn what H sounds like into your head in the most hypnotising manner. More like widen the difference between symbol and pronunciation. Ah well. H. H. H. H. H. H. H. H. H. H.
Inspired by this video: https://youtu.be/0UPzRdlJA6g?t=46 Woo, down to the end of April Fools.