secrets of growing cilantro?

[Longlake]

I plant cilantro early and often, filling every nook and cranny available. There is one variety, Calypso, that has been far slower to bolt for me. I'm actually waiting for it to bolt so I can save seeds, but it's still nice and compact. It's the only variety that's actually lasted longer for me. Caribe and Slo-Bolt (sp?) were a bust for me last year, bolting as quickly as the self-seeded stuff that comes up every year.