These have been updated as of 07/07/2022, In between seasons 19 and 20. I will update these as often as needed. The empty numbers are ones that haven't been revealed yet.

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1: Never let suspects sit together

1: Never screw over your partner

2: Always wear gloves at a crime scene

3: Never believe what you are told. Double check.

3: Never be unreachable

4: Best way to keep a secret. Keep it to yourself. Second best, tell one other person - if you must. There is no third best.

5: You don't waste good

6: Never say you're sorry

7: Always be specific when you lie

8: Never take anything for granted

9: Never go anywhere without a knife

10: Never get personally involved on a case

11: When the job is done, walk away

12: Never date a co-worker

13: Never involve lawyers

14: Bend the line, don't break it

15: Always work as a team

16: If someone thinks he has the upper hand, break it

17: 

18: It's better to seek forgiveness than ask permission

19: 

20: Always look under

21: 

22: Never, ever, bother Gibbs in interrogation 

23: Never mess with a Marine's coffee if you want to live

24: 

25:

26:

27: Two ways to follow someone. First way, they never notice you. Second way, they only notice you.

28: When you need help, ask

29:

30:

31:

32:

33:

34:

35: Always watch the watchers

36: If it feels like you are being played, you probably are

37:

38: Your case, you're lead

39: No such thing as a coincidence 

40: If it seems like someone is out to get you, they probably are

41:

42: Never accept an apology from someone who just sucker-punched you

43:

44: First things first, hide the women and children

45: Clean up your messes

46:

47:

48:

49:

50:

51: Sometimes you're wrong

52:

53:

54:

55:

56:

57:

58:

59:

60:

61:

62: Always give people space when they get off an elevator

63:

64:

65:

66:

67:

68:

69: Never trust a women who doesn't trust her man

70:

71:

72:

73:

74:

75:

76:

77:

78:

79:

80:

81:

82:

83:

84:

85:

86:

87:

88:

89:

90:

91: When you decide to walk away, never look back

92:

93:

94:

95:

96:

97:

98:

99: Never tell Gibbs he's being audited

Let me know if I am missing any. I did like 97% of these out of memory so some of them might not be fully correct.

Thanks!