Submitting writing to markets is a LOT of work… and truthfully, regardless of the amount of research you do to make sure the work you’re sending is a good fit for the market you are submitting to, you may or may not get accepted. I spend more time submitting than I do writing these days.
My Stats for 2013/2014:
No Response: 16
I track my submissions on Duotrope… It’s worth every penny and lists the majority of journals, contests, etc. I submit to.