What rules would a vampire you created follow?

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I am currently writing a book, but am torn when it comes to "rules" for my characters. By rules I mean things they can and cannot do. My question is this: what rules should a modern vampire follow? Bram Stoker's Dracula had rules he had to follow: he could not enter a house without being invited, he slept from dawn to dusk, he could could not cross open water, he could transform himself into a bat, wolf or mist. He could only be killed by a stake to the heart and having his head removed. The best tools to use against him were a crucifix, garlic, holey water and blessed wafer. Today, vampires have evolved into something Mr. Stoker would not recognize. They break in houses, garlic has no effect, they get blood from blood banks, feed on willing participants, some even walk in the daylight. When Stoker wrote Dracula in 1897 things were very different than today. There were no modern conveniences or instant communication. No cell phones, pdas, internet, electronic, etc. Medical practices would be considered barbaric nowadays. I believe technology has changed our views of what is acceptable horror. Perhaps what what was scary one hundred years ago no longer is so we expect something different. Having said that, what rules do you think a modern vampire should follow? If you were writing the book what restrictions and/or liberties would you give the character? Thank you in advance for your input.