Ideally, you would have pitchable wort right after you brew. Since this is the real world, most people aim for 15-20 minutes with an immersion chiller or similar device.
AurŽ Entuluva! Day shall come again!
Sheldon: If its a brew day, its a good day
raptorvan: it makes the beer so silky smooth its like drinking a glass of giggling angels.