Oh hell no!

I have a list on the wall, and every time I think of something I write it on the list, less likely to forget things that way. I then stockpile toiletries etc and tick them off on the list, then get the cases out when I feel I won't get laughed at TOO much by DF, pop things in the cases, and tick them off on the list!
I do take everything out and pack it properly a day or two days before I go though... that's when I weigh the cases and take half of it back out again!