Stage fright?

Less than two weeks to go and my ability to think about my role as subdeacon is at an all time zero. I started some intercessions - there are a few formulae but you do have to have some inspiration in terms of wording. I had one practise with an empty chalice and managed to tilt it so just imagine with a full one! I've asked for a run through of steps/where we stand/bow etc with the head server next sunday and have to catch a time with the curate to run through with the chalice. I was told to be wary of administering the chalice to "tall blokes" as apparently you can misjudge where their mouths are....very funny, i don't think!!