First Rule-"With the first pick", you take the best player available, regardless of position or need. Even the Colts know, you don't pass on top level talent.
First round rule-"Underclassmen". 65 underclassmen made it into this draft, and most of them will be taken in the 1st 2 rounds. Last year 8 out of the top 10 were underclassmen and this year its likely it'll be 9 out of 10. Their ceilings are higher because seniors have been so heavily scouted. You know what a senior does good and bad, another year of breaking them down, and they're physical growth ceiling isn't as high as an unknown.
There are many more, so let's hear them. Here's a couple mock draft rules too.
Know your opponents- you cannot accurately predict who will be available without having some idea of what your oppositon is doing. Quinton Coples and Vinny Curry were commonly seen in blogs here in the rumblings, but if you spend time reading what the dolphins might do drafting ahead of us, you'll also see those names.
Know your team - Obviously you fill your depth in the latter rounds, but early picks are done on talent and sends a message to the current roster holder. Draft a QB in the first two rounds, and your telling your current QB, he isn't the future. Knowing who management thinks are their stars, will help you avoid drafting a position unlikely to go to that respective team that early in the draft. Examples: the Patriots will not draft a QB early, the Jets won't draft a CB, the dolphins no RB, and if they re-sign Stevie no WR for the Bills.
I like to do one early mock, a 1.2 version before the combine, and the 2.0 after, Post that says 6.0 mocks is a little ridiculous.
So shoot me your rules, or even some common knowledge on what usually happens at draft time, other than a bunch of kids start making nice paydays.