__________ by __________

Each clue can below answered with an expression in the form of ________ by ________. For example, given the clue SIMPLE ART LESSON, the answer could be PAINT BY NUMBERS.

1. Unreliable, as a business
2. Very close together, as in a crowded room
3. Type of sports announcer
4. Gain skills while working
5. Methodical way to get something done
6. Classic Alfred Hitchcock thriller
7. US Constitutional guarantee
8. Common pre-surgery directive
9. Best way to get others to follow
10. "I'm OK with that."
11. Suddenly appearing
12. Control using coercion
13. Unexpected, intense experience
14. By whatever means necessary
15. Do something without imagination or creativity


Answers:

1. Fly by night
2. Cheek by jowl
3. Play-by-play
4. Learn by doing
5. Step by step
6. North by Northwest
7. Trial by jury
8. Nothing by mouth
9. Lead by example 
10. Fine by me
11. As if by magic
12. Lead by the nose
13. Baptism by fire
14. By hook or by crook 
15. Paint by numbers