Definitely the best way to contact me ! Simply replace firstname and lastname with right values.
I'm used to forget my phone in random places, and I don't use it for long-term stay abroad, so if you can't reach me, try email instead.
As my resume may help you guess, I'm moving quite often, so trying to contact me that way is not a wise choice.
Well, I guess I may need to tweet with this account from time to time, but usually I don't.
I'm not connected that much, but from time to time it is mandatory when I'm abroad.
I'm using many messaging systems and social networks, but for a first contact, I definitely prefer e-mail or phone.