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I try to rely only on the video's then try to solve the challenge before digging deeper into the concept but sometimes i feel like the videos are not enough to get all the logics of the challenge.
Camilo Lucero27,692 Points
Always help yourself with external resources.
Even though the videos are made to contain enough information for you to solve the challenges, there is usually lots more to be understood. Treehouse is a great foundation, but to become really good, you must be curious and use every resource at hand.
If you are using Google and Stack Overflow to solve challenges, you are on the right path. Almost every professional developer does the same to solve real world programming challenges.