I admit it; I got my vampires mixed up.
To keep you from suffering my embarrassing fate, I give you a far-from-all-inclusive list of the recent vampires in books and television and their weaknesses and powers. In case you come across a fictional vampire, you should be prepared. I mean, what if you tried to trick a Twilight vampire into the sunlight? You would just be blinded by the shimmer.
Traits: Fangs extend when they feed or if they are excited, but they are retractable.
Weaknesses: Silver, Sino-AIDS (both can lead to death if poisoning is severe), garlic
How to Kill: Full exposure to sunlight, burning, decapitation, wooden objects through the heart
Misc: Crosses are okay, must sleep in caskets or something similar during the day, have to be invited in
Traits: Ordinary appearance, no retractable fangs
Weaknesses: Garlic and EDTA
How to Kill: Wooden stakes, silver, and sunlight
Misc: Can eat human food but has no nutritional value, sunblock can provide temporary protection from UV Rays
Traits: Appearance changes before biting - eyes become white and fangs extend
Weaknesses: Sunlight, wooden stake (causes paralysis), silver
How to Kill: Decapitation, fire
Misc: Holy symbols don't matter, do not have to be invited in
Traits: Very pale with visible fangs, usually quite attractive
Weaknesses: Sunlight (sunlight will kill younger vampires, but it is only a small threat to older vampires)
How to Kill: Fire, dismemberment, full exposure to sunlight
I wouldn't want to mess with these vampires. Just saying.
Buffy the Vampire Slayer / Angel
Traits: Face changes drastically before biting, but fangs are retractable
Weaknesses: Holy symbols
How to Kill: Wooden stake to the heart, sunlight, burning, beheading
Misc: Have to be invited in by resident of property
Traits: Eyes become a bright shade of blue or gold when they transform.
How to Kill: Sunlight (Lycans uses photogenic bullets against them), wooden stake, decapitation, drowning,
Misc: They can create offspring.
The Vampire Diaries
Traits: Drink human and animal blood. They have heartbeats, just slower than humans.
Weaknesses: Cannot cross running water unless they are young vampires
How to Kill: Sunlight, stake to the heart, decapitation
Misc: Wearing a lapis lazuli gemstone protects them in sunlight, they can communicate telepathically, they can shift into animal form, have to be invited in
Traits: Extremely attractive, sparkles in sunshine, eyes are red if they drink human blood and gold if they drink animal blood or black if they are hungry
How to Kill: Tear apart and burn pieces
Misc: Do not require sleep
I don't know what's more sad - that I've barely scraped the surface of the types of vampires out there or I've watched / read all but one of these. Feel free to add more in the comments. Oh and check out these extensive comparison tables on Wikipedia.
Oh and if you run into a kind I didn't list, stick to the basics or the least common denominator. Beheading is the safest route.