Why being sick helps productivity and focus
Being sick is sometime a blessing. If you are so sick that you cannot do the minimum required, you will have to prioritize.
If you think there is a possibility that you can die, this sets in for full. Play around with the idea and the number of years you have. A mini-scare is good for your focus and goal setting.
Even if you just cancel a few planned calls or meetings, the forced reflection is valuable. This is the pareto principle. Your results are probably coming from 20% of your activities. The hard part is to figure out which 20%.
If you are sick the 80/20 is in motion! Be more sick!