We’ve recently updated the Marvel NOW! reading order which now extends past Original Sin and including the Death of Wolverine.
There were some very confusing appearances lately which would benefit from being read in proper order (Most notably the events of New Avengers, Original Sin, Captain America and Uncanny Avengers, whose endings all occur at a very particular point in time).
As always, be wary of the order of the bottom of the list; many stories are still ongoing and their placement is likely to change.