Hmmm...I went looking to see if I could post links to a couple examples, but it seems to have been a bit too long ago. Basically, we used the following template as a baseline for each post.
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Ah, we can't nest spoiler tags here to compactify everything, and the table tags work a bit differently, so I'll just strip those out. OK, the template at the bottom of this post is probably a good starting point for what we used, with some tweaks. Public information was put out where it could be easily seen (Card counts, face-up cards) unless it was too long (Graveyard, RFP), and private information (facedowns, hand, deck contents) kept hidden. We included card fields and numbered the cards on the field because that was occasionally actually important to certain cards (Blasting Fuse, for instance), as well as for identification when blind-shooting facedowns where there were multiple options. Some people linked their cards to the wiki so that effects could be found more easily, some didn't; that was another optional thing. Some people included information like type/attribute/attack/defense/level, others didn't; that was also something that varied from person to person, though most people did at least include the basics.
At the start of a match, both players roll a die for initiative (1d20 was what we used because of D&D, but 1d6 seems to be the norm for games here; either will work), along with five-six dice for their starting draws (based on how many cards were in their deck, so 5d40 would cover a 40 card deck, with a few extra rolls in case of duplicates). From there, we'd basically play it out like a card game, updating various fields each turn based on what we drew (using a 1d-whatever- at the start of the round, for however many cards were left in the deck). The important thing is that, during complex turns, sometimes we'd typically stop at various points to ask if there would be a chained response (such as on summon or on attack) - that's especially true when we were trying to bait a particular response. Oh, occasionally, if the turn player was going to activate an effect on chain to a mandatory event (for instance, when the next player draws at the start of their turn), it would also be put in a spoiler that they could open when they triggered that effect.
Field:1|2|3|4|5
-|-|-|-|-
-|-|-|-|-
MON:
S/T:
Life Points: 8000
Facedowns:Graveyard: 0
Banished: 0
Hand: 0
Main Deck: 0
Extra Deck: 0