Browning of the tips, fragile bract breaking from the Strig, golden lupulin (or school bus yellow), intense pungent aroma, and papery feel to the cone itself are good indicators of harvest time. If it looks like it was stuck in the oven and browned, and it smells cheesy or garlicky, it's way over done. If it's still light green and feels "cool" to the touch, "bouncy" or "squishy", doesn't have much of a hoppy smell (grassy) it's not ready yet. The best comparison is one I read about the consistency and sound being like if you were pinching a napkin in your fingers. If it's like that, it is papery enough to pick. Let it hit most of that criteria, and you'll be swimming in the Golden lupulin sea.