Working slow and not getting stuff done is a big problem for many teens in the world, and this book talks about 5 major types of delay and the way to help each of these ways. 
One of them is rebel, and I'm going to talk some about this type right now. This type of delay is produced by unwillingness to do things and unlike the things, this type of slowness is usually found under high pressure, the way to fix is by thinking everything more friendly and closer so that you don't dislike them. 
Second is called warrior, this type of slowness is actually produced by going ahead too much, usually because they like the thing a lot and want to do too much that they don't have enough time for. This type of delay is treated mostly by slowing down and thinking the goal more directly. 
Third one is the pleasers which is people who are too friendly toward other, and usually happens to friendly people which will cause them to be dragged slow by other people's will. This type of delay can be treated by isolating, for example, if you are trying to finish your homework before it is due, it is great to just close your door and be alone in your room and focus. 
Fourth one is called the believers, they are usually believing in their ability and often delay their worth to later date which usually will not end good. The way to fix this is by creating a clear plan so these people can know what they are going to do now just looking at what they think they should do. 
The last one is the perfectionists, they are usually looking for the best and going toward the best but usually going too deep just like the warriors. This problem usually won't be too bad but it is usually not helpful. The way to fix this type of delay is by doing what is enough not doing all they can. 
Last of all the book tells us about some distraction source that slow people down. First there is the phone, the phone can be distracting because teens tend to check their phone to feel connected to their friends, sometime this create anxiety and cause the teen not able to focus, the best way to stop phone distraction is just to put your phone away or giving them to your parents. And another thing is the people. People usually will distract you even if they don't mean to by chatting or pranking or just simply being near you, this is especially huge problem for pleasers because they tend to connect with other people so other people nearby will clearly distract these friendly people even if the other people does nothing. Best way to fix this is just the solution for pleasers, lock in a room and isolate for the highest efficiency. Basically, the way to be more efficient is to be focused on what you're going for not the target seems best right now, slow down and be clear with everything but not be over focused, also avoid distraction from other people and item like phone by locking both outside of your room.