Here is part of the interview with editor Hilary Sares fom Kensington. 

*1. What do you look for in a face-to-face pitch? I love to be
surprised and I don't have set expectations—writers just have to give
it their best shot and relax as much as humanly possible. You really
don't want to come across as a quivering ball of sweaty-palmed,
trembling neediness in an uncomfortable blazer (most editors go for a
Publishing Casual look, which is pretty close to Thrift Store
Half-Price Tuesday). Somewhere safe, stash the bulging carryall bags
that proliferate at conferences and do the same with sundry
impedimenta that make for awkward entrances and exits. You won't be
able to shake hands real well with an overstuffed promotional tote for
a book titled, say, SWEET SAVAGE HUMP, slung over a charm-braceleted
wrist. Basically, you want to come across like a pro. Practice your
pitch with a funny friend over and over. Practice it in mock
Hungarian. Practice it in charades. I.e., get loose and get it down
cold. Keep in mind that editors have heard thousands of pitches and
most will do what they can to put you at ease. If we seem quiet or
noncommittal, it's because we're waiting to hear what you have to say.
By the way, it often happens that the quietest writers will pitch the
most outrageous ideas. So, what do I look for? An author who shows
real passion for her/his story or her/his non-fiction concept gets my
attention—it's likely to be interesting even if it's something I'm not
acquiring at the moment. Index cards and a droning, step-by-step
recitation of plot are not the best way to present yourself or your
work. Opening a laptop instead of using index cards? Don't even think
about it. Make eye contact. Smile. Editors with reasonably good
eyesight will usually return the favor.

2. What do you look for in a query? Brevity.

3. What's your biggest pet peeve about queries? Tiny print and
   crowded margins, used in order to squeeze in as much information as
   possible. Just sell the book. That's all I'm buying. Got awards and
   professional credentials? List those in a back sheet but don't make
   it look like a resume and don't go on and on. Writers who provide
   gabbling, overly detailed lists of accomplishments tend to write
   similar prose. Get to the point. You can't go wrong.

4. What kind of books do you like to read? Everything.

5. What kind of books do you represent/edit? The verb is acquire. The
   confusion among new writers about these terms unfortunately means that
   a lot of them sound like amateurs in cover or query letters. Agents
   represent books, editors acquire books, copyeditors edit books. Yes,
   editors edit, but it is a very different kind of editing from what
   copyeditors do. And since what the author wants an editor to do is
   buy her book, the term is acquire. Anyway, I acquire romance,
   historical romance, romantic suspense, erotic romance, paranormal
   romance in all those genres, mainstream women's fiction, mystery and
   thrillers.

6. What's your best advice for new writers? Focus on improving,
   developing, and energizing your writing. Every new writer has a lot
   of competition, but keep in mind that a lot of them spend far too much
   time online obsessing over silly stuff and not actually writing very
   much. You may feel like, tra la, you're in the club if you do it too,
   but it will eat up time and energy if you do too much of it.

Don't critique your work to shreds. By the way, editors do not want
to hear what your critique group thinks. We don't care.

Whether you are sending a letter or meeting with an editor in person,
keep a few Sort-of Commandments in mind. Thou shalt not grovel.
Editors aren't gods. Thou shalt not worry too much. Nothing you say
or do is going to make you or break you. Editors aren't mean, as a
general rule. Thou shalt not drone. Editors get sleepy. Thou shalt
not apologize for being nervous or being a stay-at-home mom or working
in a profession that doesn't have much to do with writing but wanting
to write anyway. You wrote something, you're a writer. Yup. Really.
You are.*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Yes, I know this is an editor of romances, that possible not many here are as interested in but the advise is sound no matter what the genre.