When you’re given a task, try not to rush through it. Try not to aim for a quick finish so you can proceed onto your next to-do. Why not reflect on the task at hand first? Analyze the given task and slowly begin working on it, being mindful as you break it down into smaller and easier tasks.
Savor the idea that you are capable of doing such task. Simplify things. As mentioned, try to break down the task into smaller bits of easier and simpler tasks. Then slowly work on each bit one by one.
Try to be very cautious, precise and accurate. Aim for 0% error output. The more cautious you are, the more effective you will be. You don’t have to finish first. You’re better off finishing with the highest quality output.