One More Time, With Feeling (seriously) - Edward Winkleman
This suggestion ...
"Once you have a short list of galleries that are a good match strike up a conversation with those galleries. You may not gain initial access to the dealers, but in some galleries you can. In these conversation, be generous and insightful. Demonstrate that you understand what the gallery is doing and that you like it. Do all of this before you broach the subject of your own work. Consider doing it and leaving it at that for a while."
... has given rise to a lot of comments of the 'brown-nosing' type. But as Winkleman points out - if you don't respect what a dealer is doing, why would you want to be part of it?