A task marked by a red or orange corner is one of the 3Ts, which means they are part of today's priorities. Prioritize them and try to complete them before the rest as this will affect the points you get at the end of the day. You will see it has an orange/red corner, both in the task and in the context (home, street, office, laptop/phone, etc.)
You may find yourself unable to complete one of these whenever you are not in the right context, so you will have to wait until you actually are so as to complete them.
It can also happen that you have marked important tasks (3T) on days when you cannot resolve them, usually due to lack of time (very long tasks, little time available in the agenda). Just like in real life, there can always be unforeseen events that will make it impossible for us to fulfill our purposes one hundred percent. The Triskelion system brings us closer to the total management of our time, but it is impossible to complete it perfectly. The objective is to get as close as possible!