Hi, I am new to this board, but I wanted to share a small trick with you regarding the achievement 'Plastered Perpertuity'. I could not find it mentioned here yet.
To get Plastered Perpetuity, you need to have your sim with a happy or mean drunk modlet for 24 hours.
When I got further down the drain with 'sloshed' I did not get the achievement. As mean drunk or happy drunk has no focus effect, they don't have a timer set on, which means it can be tricky to know when to drink. But if your sim is drinking a nice ale or wine (not a regular one) he will get a nice buff with a timer set on....just make sure your sim will drink before the timer is off and not too often or you will get sloshed.
The achievement will trigger when you finish the current quest (at least in my case).
I don't know if it is important, but this sim was not a drunkard.
I hope this helps.