Every job I apply for I need to mentally accept. I have been applying on and off all morning. Yesterday I wouldn't have considered applying for the ones I applied today. The difference is the time spent musing in the back of my mind that brings me to think that I should apply.
Sometimes I read the job description ten times on different days before accepting it mentally. Of course this is a time-consuming way of doing things, especially considering the number of rejection letters I have been receiving but probably a sensible way of making sure I am prepared for that which I am applying.