• "ayy yank current line to a register
• "ap past from a register
• ctrl-r a insert and command mode, paste from a register

:bro oldfiles or :oldfiles

:earlier 5m

Type something in insert mode, return to normal mode, press Ctrl-A, watch the magic happens.

• vim
• vundle plugins
• ctags-manager
• vim git workflow
• statusline
• VIM registers