Had a long day (up at 5.30 and then the usual hectic day with 3 kids), had them ready for bed at 7.30 but they didn't settle and I ended up shouting "I've had enouuuuuuuugh now, just go to sleeeeeeeeeeeeeeeeep" at 8.15, which is obviously conducive to sleep
Kids still fussing at 8.30 so, even more wound up, I shouted again and stamped around whilst ranting. So I put the fear of God into them and they are sleeping now.
Of course now I sit here swathed in guilt.