Mind you joking apart....After years of really loathing the very sound of the 'F' word and never ever using it, I have found that on a few occasions and only when alone I find that saying it very abruptly, just the once, very effective. As in at that moment of real annoyance for say breaking a decent cup or stubbing a toe, it passes off quickly and I just let the moment go.
Washing bio gel or quid in the drum