[TYPO3-mvc] best practise for teaser vs list?

[ralph]

hi list, i wonder waht is the best practise for a teaser and list plugin.
i have to cols. one for the normal content, one col right. the old way 
would be to use something like CMD=teaser and the send it to the right 
function. how should i do it in extbase? send everything to index and 
then..? redirect wouldn't work.. so how do i call the action depending 
on a flexform field for example.