I often feel like the GoF's Design Patterns are considered as the answer to every programming problem. But I also feel like I'm using them once in a while. Then I read the 14 patterns to ace any coding interview question by Fahim ul Haq, and I found them more familiar. Closer to my usual coding experience, but still not close enough. I feel like something is missing in the good dev manual.
Which design patterns are you using every day? I propose these 3: