Smarts dogs can be a blessing and a curse. On one hand you can certainly teach them a lot more, as their mental capacity allows them to learn more, and more complex commands at that, leaving no end to the amount of things they can do. On the other hand, smart dogs also tend to be stubborn, and worse yet, more thorough troublemakers, as they can easily get into things dogs with less awareness may be able to. But if you choose to see it as a blessing, as we advise you to do since there's nothing you can do about it, take advantage of their abilities by getting them into some brain-stimulating activities, as it may not only help them grow and entertain you, but save you a headache in the process. But remember, some dogs are much stronger in certain categories, so just because they fail in one doesn't mean they can't excel in others!
Completing mentally-stimulating games with your dog can be great for a lot of reasons. It gives you both something to do, increases your bond by helping you spend structured time together and it makes you both work to find out more about each other. Brain games can not only be a great way to figure out how smart your dog is, but exercise them enough mentally that it could improve their cognitive abilities overall. If nothing else, at least it should help to tire them out if it doesn't tire you out first!