I recently applied for some credit cards and wanted to share my results. I began sharing credit card application results a few months ago (see My Latest Credit Card Applications: Strategy and Results: Spring 2015) and will continue to do so each round.
I applied for the first two cards on the same day. Both were planned for this application round. The last two cards were not planned but I jumped on them when the sign up bonus was higher than usual. Initially, I considered applying for a third card the same day as the first two but decided to hold off. I prefer not to do huge app-o-ramas to be able to apply when there are higher than usual sign up bonuses.