Okay, a minute might be too long. If you are thinking that you have some time to plan and decide what to do with it, you're not doing the exercise. It has to be such that you accept that there's nothing you can do to control what's happening and you give up your grasping for control. No point in using up your moments trying to decide what to do
next.
Whatever you are doing right now, this could be it, and that's that. The magic is the chance to actually be present for an instant rather than just be lost in your anxieties and then be dead.
When you practice experiencing this as your last moments, you might just look out the window at the clouds and think about your most meaningful memories, but you also might as well keep washing the dishes and finally be really present with it.
If washing the dishes is your last moments, it can feel like a profound and meaningful experience of dish-washing. You can realize that you've been stuck in a judgmental low-level aversion to dish-washing and suddenly all the tension disappears, and you realize both the awesomeness and the mundaneness of it all at once. Water, sensations, plates are beautiful, you're living this life in some place, and it is what it is, and really it's amazing, we just constantly overlook it.
When you then do not actually die, you have the chance to prioritize being as grateful and loving as you possibly can in every moment going forward, at least whenever you can bring that presence back to mind. Whether that's when cleaning or being with others.
You might decide that there are activities you'd like to never ever do again.
But in the end, there's no right or wrong activities or context, there's only being present or not. We can be present even while the activity is making plans.