“Was it a good rejection?” one might ask. By which I mean, were there constructive comments in the letter. Many times, some editors will take the time to jot down significant feedback, which is always appreciated. My advice is to keep submitting, hang in there, and it will happen. Your story will find the right publisher.
Here's Bethany Roberts' neat blog, which addresses how to deal with rejection letters and other writing tips.
"The biggest mistake a writer can make is not taking the time to fully understand the publications, publishing houses, or literary agents she queries." -- Writing tip from Writer's Digest Weekly Planner