Traditionally a next step would be political, then material, support for an organized internal opposition, but there doesn't seem to be an obvious one in this case.
Yes, this is already happening since last year, and was already scheduled to be expanded for a fourth time in June. I assume this clinches that, and probably more.
But the fact nobody seems to know there's been sanctions since last year suggests my other point - they're woefully ineffective as long as they can get other support.
NATO is a military alliance, not a trade union. There's no way for them to organize what you're suggesting.
> It would take a week.
Fidel might like to have a word with you...
My point is: There's a lot of people in this thread demanding a vague "something" be done, but it's really not clear whether there is "something" between what the EU's plan has already been for months and a hot war, other than some ill-considered immediate panic.