Quick tips

• Same time each day. A fixed moment, like with your morning coffee, keeps the streak alive.
• Read before you rush. The symbol code is timed; the other drills aren't. Take a breath on the cube.
• Count the gaps. In number runs, write the differences between numbers in your head.
• Estimate in steps. For the quick estimate, break the question into two or three numbers.
• Watch the trend. One low day doesn't matter. The curve over two weeks is what counts.