I would use my action support file rather than create a separate file for it. I would enter it onto my list and add N/A Supp in brackets so that I know where to find the related paperwork. I often will get to items that I have added the same day as I also have short completion times for my work, but this works well for me. I much prefer to spend the time putting the item on my list (5-10 secs often) to ensure that it is captured safely. I never know when something urgent will come up and derail me for the day and I like to have everything safely placed on the lists so that I am not worrying about forgetting to do something.