There are so many rules, guidelines, preferences, and pet-peeves that you hear about in regards to literary agents and submissions. Perhaps it's no wonder a lot of writers say "to heck with it all" and proceed how they think best. Understandable, sure, but maybe not the best choice.
I thought it would be fun if we put our collective heads together to list out the Dos and Don'ts. I'm anticipating a great and rather long list, but please keep in mind the subjective nature of the topic as you give and take away from it.
DO research prospective agents and make informed decisions.
DO follow submission guidelines to a T, as best you can.
DO personalize your queries.
DON'T mass e-mail agents one general "Dear Agent" query.
DON'T send "goodies" or "research material" to prospective agents.
DON'T use unusual fonts or colors.
Your turn! There are so many more... What will you add?