Common sense goes a long way here: Read their profile.Try to find something that most people may have missed.
You don’t want to give a beautiful woman a physical compliment because it won’t have a huge effect on her.
This isn’t a CV; you aren’t auditioning for anyone, so don’t write it like you are trying to impress. Don’t be afraid of telling people who you are and what you love doing.
It will come across as needy, and although you may have the sexiest picture imaginable, your chances of meeting someone are virtually zero if you sound like a douche. A truly attractive person is comfortable in their own skin and has the confidence to reveal their thoughts and feelings without caring what anyone else thinks.
The slower method is about building trust and rapport.
The best way to do this is to suggest moving away from the dating site to a more personal method of communication.
Likewise you don’t want to tease someone who comes across like they might not be the most confident person.