query subject line

I always put: Query: TITLE (unless agent guidelines ask for something different--always go by guidelines first).

"Query" should suffice--some agencies filter, and it helps your query get to the right place.

I usually put:

Query: TITLE (genre)

I mean, you don't want to put your entire letter in there, but I saw the suggestion to put genre in there once and it stuck. That way if an agent knows they're not in the mood for a certain genre, they can skip it and come back to it later - and vice versa, if they're particularly in the mood for your genre, your query might stand out more. It's a win/win. The only reason I leave it out is when the agent doesn't clearly state they represent my genre - some are vague about what they rep. In that case, I'd prefer them to get sucked in by the query instead of turning them off right at the beginning.

Definitely put the title in if it's particularly catchy/original. If it's not, I guess it can't hurt to leave it out, but I don't see any reason to.

I always put Query for Mr/Ms ________. That way the agent knows it's for them, and I'm not mass querying it.