It's much harder from text-based profiles than in person. For obvious reasons or perhaps not so obvious? If you are using anything else you are wasting your time! Group shots are often blurrier and less flattering than individual photos. Some online daters seem to have a hard time with that. This is an example of how sometimes profiles are too short and give you no clues to who the person is. Oh, also, under no circumstances should your profile picture be of you playing a guitar.
Don't make jokes if you just sound like some college frosh asshat fishing for dates to the Phi's house party, unless you are in fact a college asshat fishing for a date to the Phi Luau house party.
Exactly What To Say In A First Message
Funny is good, but be gentle This shows you are being upfront and honest, and not a stalker. Well as I said I've never had to shatter the ice via the internet, let alone a letter of some sort. The important parts again are: Not your concern.