Useful VIM command that I still can't remember

• “0p - pastes the last explicitly copied text
• :reg - Show a list of registers
• J - Merge current line With Next Line
• =, == - Fix indention
• u,U(in visual mode) - lower, uppercase
• q: - list command history
• q/ - list search history
• Ctrl ^ - go to previous buffer
• :w !sudo tee % - save readonly file
• diw - delete a word
• di(, da( - delete text inside/include ()
• di", da" - delete text inside/include ""

For rails.vim

• gf - open file from cursor
• :R{view,model,controller,spec} {file}