Be ready to deal with the yuppie, self-important types because there are plenty.... Especially on Saturdays. But the you will find useful deals and tasty ready made food in the food court area.
Often quite busy, later weeknights not too bad. Pretty well stocked and ever-changing content. Come for just some free samples & a snack from the food court or find yourself a few new favorite items.
Buy bulk and save a ton. I recommend going there mid afternoon for all of their food/drink samplers set up throughout the store. Their meat deptartment carries some of the freshest/best tasting cuts.
Get there at opening, stop to eat on your way out. Congratulations, you've completed a Costco trip in an hour and avoided the crazy masses, plus you still have the rest of your day.
Bring cash to grab a coke and a churro for your shopping journey. There's really no other way to shop here without being irritated by all of the people everywhere.