CTRL-W <arrow left / arrow right> switch window

:tabnew         neuer Tab 
gT, gt          Tab wechseln
 
$ vim -p <file1> <file2> files in Tabs öffnen

$ vim -d <file1> <file2>

Use shift+Mouse button to paste stuff.

.vimrc

"activate syntax highlighting
syntax on
"cope with black background
set background=dark
"honor modelines in files
set modeline
set modelines=5
"activate intelligent indenting
set autoindent
set backspace=indent,eol,start
"display statusline
set laststatus=2
"display position in statusline
set ruler
"activate linenumbers
set number
"display tab characters
set listchars=tab:>-