ETOPS wise...
We don't insert them in the Primary flight plan. Several options for displaying them once you've entered them as a pilot waypoint though. Secondary FP (Diversion planned from an ETP set up there anyway). Pressing the WPT button on your EFIS control or using the L1 key on the MCDU and entering the most relevant points as a REF FIX. Airbus stuff.
Different strokes different folks though I guess.
ETP on normal flights - Airbus makes it quite easy to display an FMGC created ETP on your route for any two points. I'm rather new so find it a useful tool when adhering to SOP's and giving the occasional "if the proverbial hits the fan now this is where I'd go and after that here" brief. But that's just me.