I am so bad at this. It seems like the easiest thing to do, but I struggle to keep sending out stories after they have been rejected a few times. Have any of you ever had this problem?

I think my problem is the amount of work I am producing with doing W1S1 weekly. Every week I write a new story and think it is the best thing ever. I am excited for that story to go out, but as the weeks or months go by I feel like my newer stories are so much better. It makes it so I kind of give up on the older ones. Does this happen to any of you?

Right now I have 15 stories out there, but have have twice as many I could send out. Sometimes when I am researching markets for a story I just decide to write a whole new story instead and send that out over an old story. I know I could send them all out, but I don't. Do any of you work this way? How do you stay excited about old stories? And why do you want to keep the old ones out there if you are always producing more works?