Check-out lines often seem like they stretch out into eternity. I read once — in a magazine while waiting in the check-out line — that marketers spend a great deal of time deciding what to put on the shelves of the check-out lanes.

Those last-minute decisions shoppers make put a lot of money in the store’s pockets, and that’s why managers are constantly researching impulse buying.

Candy’s a huge impulse-buy item because by the time we get to the checker, our blood sugar is low and we’re often frustrated. Plus a candy bar isn’t a big-ticket purchase, so marketers feel most people will give in to temptation. If they don’t, their children will and, either way, they get your money.

But knowledge is power, I told myself as I waited in a long check-out line Saturday afternoon. I’d headed into town to shop for my son’s birthday, and I’d found some casual clothes for him in a discount fashion store.

This store lined their check-out lane with shelves, and as soon as I headed into the long abyss, the first few items tried their siren song on me.

Stacks of holiday towels and wash cloths began singing. I ignored them until I remembered my daughter-in-law loves holiday decorations.

Well, the towels were only $2.99, so I tossed a set into my basket, thinking I’d tuck them into her Christmas stocking. But there was no way the rest of that junk was going to entice me, so I moved along, feeling confident.

Wait. There’s a card reader for my camera. I’d been looking for a card reader for a while, and here was one for only $7.99. It could break, I thought, so I tossed another one in the basket.

Okay, that was an unexpected purchase, but it was something I needed. But wait, here’s some headphones. The volume on my computer is often low, and using headphones seems to solve the problem. But I can’t find the set I normally use.

I threw a package in my basket, telling myself it was only $4.99 and, after all, I really could use those headphones.

Then I came to a stop in front of the discount books shelf. I began to sweat. I’m a sucker for books, especially children’s books. I spied Shel Silverstein’s “Where the Sidewalk Ends,” and knew I had to have that book for my granddaughter.

And the holiday cookbook for my sister.

And the book of jokes for my son.

And the poetry book for my mom.

Then it was my turn to check out. I placed my items on the counter, thinking I might put some of those impulse purchases back.

But just then, the little voice inside my head whispered one more time — look at those holiday socks right next to the cash register.

Sure enough, there were some darling holiday socks my granddaughter would just love. I had to stop the cashier from totaling up my bill so she could add three more impulse-buy items to the ticket.

Some days the shopper wins, and some days the marketers win. This is one of those days where I lost the battle.

But, as I loaded six bags of clothes and other impulse purchases into the trunk of my car, there’s always tomorrow at the grocery store.

Let’s just hope I can make it past the Snickers and Twinkies with more success than I did the pumpkin towels and Frosty the Snowman socks.

This article was originally published in The Fort Bend Herald.