Are you aware that retail stores, supermarkets and sales people have clever - and sometimes deceptive - ways to let you part with your hard-earned money? You may not realize it, but some sales tactics are strategically designed to let you spend more than you intended.

Most retailers use this because it works nearly all the time. If this has happened to you, then you've fallen victim to silly sales tactics. Don't feel bad though, as there are ways you can protect yourself from this.

1. FREE SHIPPING. One of the reasons why online shopping is a success is because it brings convenience. However, paying for shipping can be a huge deal-breaker for some, as the rates are costly. Hence, retail stores have "free shipping" offers to entice buyers. Yet, this usually comes with certain conditions, such as spending a certain amount on purchases to be able to take advantage of the offer.

If your only intention is to buy a $20 item, but free shipping is offered for purchases $50 above, you could be persuaded to purchase $35 more just to "take advantage" of the free shipping. You may not realize it, but you're the one being taken advantage of.

2. BULK BARGAINS. The idea behind using baskets for grocery shopping is so that purchases and impulse buys are limited, but the grocery stores have found a way to make you buy more. They offer 10-for-$10 promotions, a trick that tends to persuade consumers to load up their baskets just to earn a discount.

A study has revealed that grocery shopping with a basket ends up being more wasteful. A shopper with a basket is likely at the store for a few specific items, but he or she may end up tossing more in their basket, according to Time Magazine. Before you put that item in your basket, weigh things properly - do you actually have a need for it or are you just loading up for the discount?

3. FREEBIES OR BUNDLED PURCHASES. Similar to bulk bargains, "freebies" and bundled purchases let shoppers buy more than they need. You may believe you're getting a good deal with that laptop purchase that comes with a free printer. But its price is already part of the offer, and you're actually spending up to $200 mor efor a computer than you originally would have, according to Money Talks.

Do your research before making any purchases. Know the actual market value of the item you plan on buying, so that you won't be distracted by the freebies.

4. COUPON SHOPPING. While there are many benefits to coupon shopping, and some have indeed made huge savings from it, sometimes some shoppers use the discounts from coupons as an excuse to buy more than they actually need, according to U.S. News.

Be money smart about coupon shopping and instead learn how to use this for getting major discounts. Double-check offers too, as some after-coupon prices may not be actual bargains.

5. REWARDS AND LOYALTY PROGRAMS. This is a clever marketing tactic that lets retailers receive repeat business. You keep coming back to buy from the store so you can stack up on points for the rewards. Some programs are worth joining and availing, such as travel perks from airline loyalty programs, but there are other offers that don't really benefit the consumer much, such as grocery store rewards, according to Forbes. Be discerning about joining or taking these offers, as you could end up wasting money in the long run.