In a new post on his blog Jason McCreary, creator of Laravel Shift, wrote down the summary of his Laracon US talk.

I consider myself a searcher. On a quest to find the Holy Grail of programming practices - that single practice which instantly levels up my skills. While I know this doesn’t exist, I do believe in a set of practices. Recently, I found one to be YAGNI. YAGNI is a principle of eXtreme Programming - something I practice daily at work. YAGNI is an acronym for You Aren’t Gonna Need It. It states a programmer should not add functionality until deemed necessary. In theory, this seems straightforward, but few programmers practice it.