OK, so here's what I do - it works for my needs, but YMMV etc.
Import into LR as raw, setting descriptive tags if necessary
Go to full-screen-per-image-view, and do an initial - and pretty brutal - pass to flag the no-hopers for removal (hit x on the keyboard)
Delete the flagged images completely, i.e. from LR and the hard drive (I can't remember the keyboard shortcut for this - muscle memory has kicked in at this point)
Switch to the develop module
Process each image as I see fit
Right-click, edit in Photoshop (if needed - I rarely do any post using Photoshop)
Repeat step #2 to delete images deemed redundant in step #5
Export as JPG or what-have-you directly from LR, either as a single image or as a batch
Hi-five whomever happens to be nearby
So, things to point out:
I keep my master images as raw files at all times
I rarely jump into Photoshop for edits - usually just for mean layer merging when I want to get a pseudo ND filter effect. Everything else I need is in LR.
Hope this helps...