1 Never screw (over) your partner.
2 Never be unreachable.
3 Don't believe what you're told. Double check.
4 If you have a secret, the best thing is to keep it to yourself. The second-best is to tell one other person if you must. There is no third best.
5 You don't waste good.
6 Never say you're sorry. It's a sign of weakness.
7 Always be specific when you lie.
8 Never take anything for granted.
9 Never go anywhere without a wand.
10 Never get personally involved in a case.
11 When the job is done, walk away.
12 One shot, one kill.
13 Never, ever involve aurors.
15 Always work as a team.
16 If someone thinks they have the upper hand, kill them.
17 The greater of two evils is always the one which puts you at more of a disadvantage.
18 It's better to ask forgiveness than ask permission.
19 If there are blanks, the job isn't done.
20 When you must choose between life and death, all is fair.
22 Never, ever interrupt a man in meditation
23 Never mess with a mans coffee if you want to live.
27 There are two ways to follow someone.
1st way - they never notice you;
2nd way - they only notice you.
35 Always watch the watchers.
36 If it feels like you're being played, you probably are.
38 Your mess, your lead.
39 There is no such thing as coincidence.
40 If it seems like someone's out to get you, they are.
42 Don't ever accept an apology from someone that just aimed their wand at you.
44 First things first, hide the women and children
45 Clean up your messes.
51 Sometimes - you're wrong
69 Never trust a woman who doesn't trust her man.