1. Line Breaks
When posting your Deck, place everything in a separate line. Makes it easier to read.
2. Organization
When posting your decklist, divide it up into Monsters, Spell, and Traps.
3. Numbers
At the start of each section, say how many of that type of card is included in your deck. Makes it easier to see your deck balance
4. Topic Titles
Your topic title should be like a mini description of what your deck does. Generic titles are not recommended.
5. Legality
All decks must adhere to the recent Forbidden/Limited Card Lists. If it violates it, don't post it here.
6. Flaming
(already explained in site rules)
7. Deckbuilding
Decks should have a general theme.
8. The Xander Clause
If your deck contains obscure or unreleased OCG-only cards, your post should also contain either a link to a description of those cards or a copy-paste of the effects of those cards.
9. The Jack Witt Clause
All deck topics are treated as rate and fix topics. This means that, when you post your deck, you will receive comments and evaluations of the deck's quality from other members and suggestions as to how to improve it. Try to take in those suggestions if you are able to. I understand that building tournament winning decks cost money, but do listen to what others say b/c they have done the same thing you're doing right now.
And just like in rule 17, don't be a jerk and say that "Your deck is so bad...", etc. OFFER improvements
10. Deck Size
Decks must be between 40-60 cards, but it is preferred you keep it to the 40-card minimum. Keep in mind that this is just the main deck.
~Most of this was quoted from Crab Helmet of YCM, except with some revisions to loosen it up~