Today marks the start of Steam's highly anticipated Summer Sale for 2016, and right now there's a nice little "trick" to add an extra 10% off anything you buy on the Steam Store. This week, Best Buy is running a giant Buy 1, Get 1 20% off sale on select prepaid game cards. The sale is running doesn't have an end date, so if you should act quick if you want to double-dip on some minor savings.

The idea here is to pick up Steam Wallet cards from Best Buy at a small discount. For example, if you buy two $50 Steam Wallet Cards during Best Buy's promotion, it would only cost you $90 and you'll effectively save 10%. As far as Steam Wallet Cards are concerned, you can buy them in increments of $20, $50, and $100 at Best Buy.

Because these are physical cards, you'll have to wait for them to arrive. The good news is that pre-paid cards come with faster free shipping. "Expedited" Shipping is free on these Gift Cards, which gets them delivered to you in 2-3 days instead of the standard free shipping 5-7 business days. You can, of course, also buy online and pick-up at a nearby store if that's an option. With Steam's Summer Sale doing away with flash and daily deals, all prices will remain the same through July 4 - giving you plenty of time.

The sale is not exclusive to Steam Wallet Cards, and works on a ton of prepaid cards across various platforms. You'll find Nintendo eShop, Xbox Store, PlayStation Store, Blizzard's Battle.net, Riot's League of Legends, Nexon Karma Koins, Roblox, EA Origin Wallets, NC Soft Guild Wars 2 Gem Cards, Jagex's RuneScape, Facebook game cards, Arc Games, IMVU Virtual Currency, and KingsIsle Wizard 101.

So for console gamers who are thinking about picking up extra games during the upcoming PlayStation Store or Xbox Deals with Gold Summer Sale, this may be a good time to bulk up on additional store credit. As mentioned, we are unsure when Best Buy's "Buy 1 Prepaid Card, Get 1 20% Off" sales promotion will last - but we suspect it'll expire later this weekend on Saturday June 25.