For some reason I have a lot of trouble quickly identifying whether consonants are voiced or voiceless, even when I touch my throat. This sometimes slows me down when I’m trying to remember rendaku readings or whether a vowel is devoiced. So I came up with this mnemonic:
SHhhh! The King Silently Checked the Heavens For TSUnamis
The voiceless consonants are (in a weird order, admittedly): SH, T, K, S, CH, H, TSU. Maybe I’m a weirdo and this is either unnecessary or doesn’t make sense to people. But hopefully it helps some poor soul out there like me!