I copied liberally from Steve Losh's suggestions in "Coming Home To Vim", complementing things with bits and pieces from Vincent Driessen's "How I boosted my Vim" and random stuff found in various formidable Vimcasts.
Most of the plugins I heavily use were created by the amazing Tim Pope.
Like so many people before, I've fallen in love with the omnipresent Mustang colorscheme by Henrique Alves.