Seasoning scrambled eggs at the wrong time
Even how you season an egg can be considered an error. Some people believe that seasoning scrambled eggs before cooking is the correct method, while others believe that seasoning scrambled eggs after cooking is the correct method. Some cooks season scrambled eggs after they're done to add more flavor. At least in some circles, the more flavor, the better.
According to Bon Appétit, the idea behind seasoning eggs while whisking them is that it results in softer scrambled eggs. Because the seasoning has more time to work its way into the egg, the flavors are more robust. It is advised to season them 15 minutes before cooking. Whether you have that much time to wait for something as quick as eggs or not, seasoning your scrambled eggs before cooking them can result in better results.