Tarek El Moussa, host of Flipping 101 and The Flipping El Moussas, knows the key to success in real estate investing: Pay attention to details and make smart choices to maximize returns on investments. Now, he's bringing his wife Heather Rae El Moussa into his flipping world, and she's learning tricks, too. If you're looking for some house-flipping tips, the El Moussas have you covered.

First impressions are important — especially when it comes to piquing buyers' interest ASAP. When designing the exterior, let the neighborhood drive your renovation decisions. "Don't overbuild for the area," Tarek and Heather warn.

"Kitchens and bathrooms sell houses," says Tarek. He and Heather recommend spending money where it will add value and provide a return on the investment. His major bathroom pro tip: "Always include at least one bathtub to appeal to a broad range of buyers."

Check out other homes in your neighborhood to determine what to prioritize during your reno and what to skip. If neighbors have gravel driveways, for example, don't spend money on concrete. "Renovate to what the comparables support, not what you think will sell," says Heather.