Congrats to all of you, can't wait to join you later this year! I'm curious how you settled on the exact date? I'm thinking June or July? I feel like there's always going to be "I'll just wait for a few more paychecks...", "just wait for the bonus", "just wait for ..." even though my calculators and spreadsheets already tell me I'm FI.
I calculated the standard 25 times expenses number, which I hit late last summer. Since my annual comp is heavily tied to a bonus payable in December, I had always planned to work through December so I could get a little cushion and get down to a SWR of below 4%, but the whole month of January was basically me battling OMY syndrome and getting comfortable with the decision.
I settled on the end of May because that's the start of summer up here and I want to do nothing but fish and play baseball/softball with my kids for 3 months. I basically told my boss I can leave any time between now and Memorial Day, you tell me a date that is most convenient for you.
As you are experiencing, there is a big difference between dreaming of retirement and actually pulling the trigger. Actually doing it gets a lot harder when you have a well paying job that does not make you miserable (yes i know, 1st world problems), but try to figure out something you really want to do that can only be done at a certain time so you give yourself a deadline. If you want to do something with your kids, summer is an easy target. If you have no kids, go hike the Appalachian trail (better start in March or April if you want to complete it), run with bulls (July), attend Oktoberfest in Munich (September, suprisingly), etc. You need some goal to force you to act.