The acronym TRAIN stands for:

a$.$ Think of all the tasks, Rate$-$the tasks, Implement your plan, Narrow down your finding

b$.$ Think of it all the time, Rate the tasks, Abandon unimportant tasks, Implement your plan, Narrow down your findings

c$.$ Think of all the tasks, Rate the tasks, Abandon unimportant tasks, Implement your plan, Narrow down your findings

d$.$ Think of all the tasks, Abandon unimportant tasks, Implement your plan, Narrow down your findings