Others might just be unfinished, like ,my purple roses I ran out of color in my ice cube trays. I do take coloring things to my volunteering work as sometimes it';s really, really quiet and I pass time coloring, again those add to the pile.
So i make piles with the ones that are colored, ones that need finishing and start pulling them together into cards.
I did stamp the sentiments last night, but I forgot to record that bit, making a decision on what kind of card it will be is usually the biggest hurdle for me.
Some cards have smudges and inky things so I try to erase them, if that doesn't work I add some of enamel dots and or rhinestones.
Where needed a bit of washitape and foamtape, but mostly simple layers with tape runner.
I hope this will inspire you to go through your unfinished or rejected work and do something with it :-D