Crossword puzzle clue "good thing to get into"

Good thing to get into

Roll a dollar bill into a nose straw and suck some of that good good into your honker

Shakespeare character who says "Good night, ladies; good night, sweet ladies; good night, good night"

Not a good thing to go into

Good thing for a witness to go into?

Whence the line "Into the eternal darkness; into fire and into ice"

Thing to get one's claws into

Stressful thing to get into