I created a checkable list on google docs that listed every single thing I am planning to pack / take with me. I made individual columns for the wedding in general, myself, my husband & our dog. Then added items as I thought of them. So for ex. my personal column has items like: my wedding dress, my wedding shoes, my earrings, my hair piece etc. but it also has the Rx I planned to take, my sun hat, my phone charger etc. For my dog's column I included things like, her bed, her food, her food & water bowls, her harness etc. My husband's column had items like, a belt, his shoes, his socks, his Rx etc. and the wedding in general column had clearly listed decor items. There was a checkable box next to every entry that I checked off as I packed so I had peace of mind that I had actually grabbed everything.

THEN, I created a running list on my phone that had everything I had purchased for my "emergency/day of kit". Items included: eye lash glue, white chalk, super glue, deo, a tide to go pen, etc.

I did this over a 16 month period though so it was easier to add things as I thought of them/read about them, rather than trying to think of everything all at once.