Expecting a stash of gift cards for the holidays? Better use them wisely.

That’s become a little easier, because many retailers have eliminated expiration dates and fees that sap the cards’ value over time.

The changes come well ahead of proposed rules from the Federal Reserve that wouldn’t allow gift cards to expire for five years, among other changes.

Even so, about $5 billion, or about 6 percent, of what Americans spend on gift cards this year won’t be used, including what’s lost to fees, according to TowerGroup.

Here’s how experts advise wringing out the full value of cards you receive:

• Keep it safe. Expert say that as soon as you get a gift card, put it in a safe place. That means stashing it in an envelope reserved just for gift cards. Some say to just put them in your wallet along with the credit cards.

“Don’t leave them sitting on a desk,” said Dudley Blossom, chairman of the marketing department at LIM College, a fashion college in Manhattan.

• Maximize the value. Buy discounted merchandise when redeeming a gift card. Shoppers wanting to take advantage of post-Christmas discounts should do so between Saturday and Jan. 2.

That’s because stores won’t be swimming in holiday leftovers through February, because they came into the holidays with lean inventories.

“You’ll find the peak” of inventory right after Christmas, Riley said.

You also should look for any special discounts from retailers like J.C. Penney specifically for gift-card users.

• Use it all up. Riley says it’s better to spend beyond the value of the gift card because that will ensure that you used all of it.

Many shoppers don’t redeem gift cards to their full value — but $3 on a gift card is $3 that’s not coming out of your own pocket.

• Strategize: Use on necessities. Want to buy that winter coat but couldn’t afford it? Use the gift card toward the big purchase.

Gift cards may be free money, but experts say you shouldn’t just buy anything, particularly in the difficult economy.