It has felt like Spring the last few days so I went out to the garden to see what early signs I could find. I came upon a clump of chives well on their way.
Grabbing my kitchen scissors and holding a small clump, I snipped them off at ground level (not just the tips). That way they will grow back again and I can keep using them all spring. After they flower, be sure to cut the whole clump off and it will grow back again. I have several little volunteer clumps so I can rotate my harvesting. If you are using them often, make sure they get plenty of water and fertilizer (organic, or course) so they will keep growing. I admit that I neglect mine and they continue to grow anyway. Chives are perennial so once you plant them, they will come back year after year.