With almost every camera and smartphone today having the ability of shooting super slow motion of up to 120 frames per second it's easy to overuse it. Youtube is already full of summer vacation videos with slow shots of good looking people jupming into water and driving around. While pretty much everything looks cool in slow motion it doesn't mean you should stick it in every single video you are editing.
Always remember, that the story is king and all the rest is there only to serve the story. And no, not having a slow motion camera is not an excuse for you to not shoot your film!