A quick tip, if I am not at my computer and I have an important task to complete then I send myself an email with the task in mind. I paste the task into the subject line, label it with high importance and send it to myself. When I open my inbox the task is listed, it’s normally towards the top of my inbox and then I have it for easy reference, I just delete it once I have completed the task. It’s a simple measure but one that works well for me. It’s especially useful if I am remote and need to remember to do something when I return to the office, it’s very quick to compose and send thus allows me not to miss a task.