Here are a few things that you might want to remember to take a long with you.

Ceremony location -------------------------------------
Date --/--/--
Time -------------

Things to have at hand for the big day

Suit or tuxedo
Shoes
A small toy
Favourite snack
Cufflinks
Brush and comb
Hair gel
Any medications
Change of clothes
Out fit for rehearsal dinner

Name of tuxedo rental store --------------------------------------------
Date and time of fitting ------------------------------------
Pickup date and time ----------------------------------
Store address -------------------------------------------
Store phone number -------------------------------------
Cost of tuxedo ------------------------------
Extra notes ------------------------------------