Jason Hellerman lists on No Film School — An Exhaustive List of Screenwriting Maxims and Their Definitions!

And here they are:

1. Show, Don’t Tell
2. Start Late, Leave Early
3. Three-Act Structure
4. Character Arc
5. Conflict is Key
6. Save The Cat
7. Kill Your Darlings
8. Every Scene Must Serve a Purpose
9. Subtext is Essential
10. The Inciting Incident
11. Plant and Payoff
12. Write What You Know
13. Dialogue Should Be Distinctive and Purposeful
14. The Hero’s Journey
15. Pacing is Critical
16. Less is More
17. The Rule of Three
18. Chekhov’s Gun
19. Enter Late, Exit Early
20. The Magic of Reversals
21. Obligatory Scene
22. Emotional Truth
23. Suspension of Disbelief
24. The Inner Journey
25. Setups and Payoffs
26. Foreshadowing
27. Write Visually
28. The All Is Lost Moment
29. Raise the Stakes
30. Voice of the Character
31. Catharsis
32. Mystery vs. Suspense
33. The Moral Premise
34. As You Write, Think and Edit
35. Dialogue as Subtext
36. Economy of Characters
37. The Antagonist’s Strength
38. Character Consistency
39. Action Speaks Louder Than Words
40. The Hook
41. Scene Transitions
42. Balance of Dialogue and Action
43. The Lie Your Character Believes
44. Escalation
45. Parallel Storylines
46. Avoid On-the-Nose Dialogue
47. The Midpoint Reversal
48. Theme Embodied in Characters
49. Visual Metaphors
50. Use of Silence
51. Juxtaposition
52. The False Victory or Defeat
53. Use of Recurring Motifs.

For explanation, see Jason’s list.

My take: I’ve tried to use every single one at one point or another. 😉