Tip: How I make the most out of my Costco membership

I'm fortunate that there's a Costco only two blocks away from where I work, so making a trip doesn't cost me in mileage. In fact, they're closer than any other local gas station, making it more convenient for frequent fill-ups.

There's a couple tips I've picked up from experience that helps me save the most money at Costco.

• Don't assume everything is a good price when you buy in bulk. Calculate the unit cost and have an idea how it compares when buying at a regular store.
  
• Take advantage of the free! They have tons of free food samples at lunchtime. Because it is nearby, I'll often head there instead of heading for fast food. It saves some cash and you get to try new things. And if I'm still hungry, a hot dog and soda at the Costco food court is cheaper than from the vendor at the mall. That said...
• If you're going for the free samples, don't get suckered into buying something you may not need. If I'm just there for lunch, I won't grab a cart. That way, I have to lug any purchases around. It discourages me from picking up unnecessary stuff.
  
• Don't be afraid of Costco gasoline. A friend who works for BP Amoco's corporate office mentioned that it's Amoco gas that Costco is selling. On most days, I usually see Costco's price is a few cents better than the lowest price in the area.
• Costco only takes American Express (or cash) because they have a deal. Don't expect that they'll let you use a debit card that's co-branded with Visa or Mastercard.
• Don't use the big shopping carts! I go in with a plan and only use the cart as necessary. Otherwise, you can succumb to the temptation of filling the cart like everyone else.
• Don't go out of your way for a trip to Costco. Like I said, it's convenient for me, but if it's a long trip for you, save your gas money and find other ways to save money.