is a Rule for sales and digital marketing professionals stating that these professionals get 90% of their software projects completed 90%, 90% of the time due to all of the other projects, duties, and daily obligations. 

DO NOT fall victim to this rule! One of the best ways to make sure that you see a project through from start to finish is to set a certain amount of time aside a day to work on that project, note big milestones for this project after you complete them and use that as a Progress report, and at the end of the month, check your progress on the project each month to see where you are.

Having a constant check-up on your project will ensure that it does not slip away from your task list, which is one of the main reasons why we forget we have certain tasks.