I play on 360 and I'm so pumped. My current characters didn't seem right to play the DLC with. So I made a khajiit today. I've actually never played a vampire. But I've seen videos. Any tips on being a vampire?

Vampirism in skyrim isnt that fun, there are many more cons than pros. If you're expecting Oblivion type vampirism you will be displeased. I would suggest waiting to actually become a vampire until the actual DLC is released, then there may be more positives to being a child of the night.

Dawnguard will most likely make vampires more fearsome, maybe by adding a perk tree. So I just wanna start now to get used to it

Tear it up then, just get bit and let nature take its course. There isnt much to it really, just avoid the sun after your first day of not feeding, and dont get spotted in towns when you go more than 2 days without feeding, or people will attack you on sight. Sneaky characters are usually the ideal framework for a vampire. Sneak is really the only skill that I personally would recommend for every vampire. The rest is up to what you think is most fun.

Alright thanks for the tips

It's true, vampirism isn't great in Skyrim. But I guess it's kinda good you don't die when you're in the sun for 2 seconds.

I always just become a Werewolf to avoid becoming a Vampire, I never use the Beast Form as I always die so much faster in that form. I'm waiting to either beta test Dawnguard or buy it when the official one is out for the 360 before I do the quest to cure my Werewolf disease and become a vampire. I never liked Vampires due to the many cons and no transformation... on the other hand, I hated being so weak as a Werewolf and only being able to transform once a day, but Werewolfs were just the better choice. Now with Dawnguard, you get a Vampire Lord tree that most likely reduces cons and makes the pros much stronger, for that reason, when it comes out I'm definitely being a Vampire.

Learn to love your powers, they're more useful than you think.
Don't get into serious fights during the day, don't forget it's day when it's day.
Know what stage you're at, don't fast travel at stage 3.

Outlying farmhouses and shacks/camps are great pitstops with little to no guard activity, prey on the peasantry, nobody cares about them.

The dirty work of actually being a vampire is rather a lot like being a thief.
Feeding pretty much uses the same skillset as stealing, softly softly picky locky.

Stay classy, your housecarl is not a bloodbank.

Here's my most recent vampire escapade... I was in Windhelm on sunday night at the smiths buying and selling, I'd just done quite a few quests in a row and had neglected to feed.
At the exact moment I spoke to the smith (who thankfully had his back turned to me) I went to stage 4... the shop menu came up and I did my shopping while scheming an escape from the heavily populated market.
I then closed the menu and without missing a beat I used Embrace of Shadows to vanish on the spot and stroll out of the city totally unnoticed (even the smith, who spoke to me, would have assumed I just walked away after our transaction).

It was a satisfying moment and shows the nice balance possible between vulnerability and power, I hope vamp lords don't lose this potential.

Like most other "roles" in the game, you need to kinda play along within the framework given and do a little bit of RPish stuff to really feel like a vampire.
A little mental input from the player goes a long way in Skyrim.

Being a vampire is fun but ultimately shallow atm, it's only a secondary trait so to speak and not something to base your whole gameplay style on... but Dawnguard is going to make being a vampire a career move so it's all good.

^^^Exactly I think those who diss on being a vampire/werewolf are expecting to cheese through the game. "If I can't slay 15 humans as a werewolf it's useless" or "stepping into sunlight and it hurting me is weak sauce" lol it's a big move in the game so if you want to use it then play like you are either a vampire or a werewolf because you obviously WANTED to be one because you chose it lol

The one thing I want to know is if I cure my Werewolf disease now and become a vampire, will I need to cure that vampire disease to get the DLC disease?

Doubt it.

In fact I predict it will go like this... You'll have to become a regular vampire anyway to even join the vamp faction, the lord form is something you'll receive as a quest reward only after several quests.

Simple.

I agree

she isn't? well, what am i supposed to use her for?
i think that's been confirmed. it's like the werewolf form, you get it by completing part of a questline