I make a notetaking template of the information I need to gather during interactions for each section of the report. It looks something like this:
Valet - Arrival
* remember to note A/C and radio settings
* ask a hotel knowledge question
Date:
Time:
Name:
Description:
Name use? Y/N
Notes:
Make a plan for when you're going to do each thing. Be sure to give your guest clear instructions for what you need their help with. For instance, my husband stands back and collects employee names, descriptions, small details (like whether they used certain target phrases), and context info (what other employees were at the desk, etc) so that I can focus on the main interaction. I actually share my notes document with him so he can add right to it for me. I also make use of voice recording either of my interactions (in places where it is legal) or of notes to myself. I combine it all together a few times a day, so that filling the forms is easy and writing the narrative can be consistent.
Of course, you should do your absolute best to follow all guidelines and give the client what they want. However, I also don't think that most shop companies would try to leave the shopper on the hook for thousands of dollars over a small error (forgetting to inspect a lobby restroom a second time, forgetting to ask a particular question at check-in). We all make mistakes when there are lots of things to keep track of. If I notice the mistake during the shop I'll reach out the scheduler and let them know and ask if there is something I can do to make up for it. They usually just tell me to mark the question N/A and note in the report that I didn't do/ask whatever it is. Just remember that the great thing about two-night shops is that some things can be re-done if needed. Didn't do the concierge interaction exactly as requested? Go do it again with a new scenario or when someone else is at the desk. For the things that I get one shot at and are crucial, I add them to the top of my notetaking template.