I started by cutting the chives right down to the ground. You might as well, the old stems will turn yellow and fade away anyway. Cutting them right back leaves a bare space for a bit, but they soon put up new fresh stems and will look alright for the rest of the summer. I have the usual magenta chives, but I also, thanks to some kind friends, have some pale pink and some white ones. And I grew some really tiny ones from some seed exchange seed, only about 5 or 6 inches tall, with flowers the size of small marbles. But they all need to be cut right back or they'll seed everywhere. Having done that, and remembering that they had already established an outpost in the Rockery, I went to cut those back as well.
Three hours later I was ready for a shower, having had a fine time weeding a corner of the Rockery.
Or admiring the Digitalis grandiflora 'gloves':
Or getting into any of the other fine activities that distract me from my careful to-do lists. Oh well, the great thing is to have an up-to-date to-do list. How else would you know what job you weren't getting done?