This post is for 1st day of [Go Advent Calendar (3)](http://qiita.com/advent-calendar/2016/go3). I’ll introduce several Golang tips which I guess is not popular but definitely it’s useful at least for me. Each tips are somewhat small to write one post for them, so I’ll introduce them by this post all at once. 1) gopkgs — List Go packages FAST by using the same implementation as goimports