For all the rigor that planning forces onto project management, it is worth trusting your intuition. If team members begin to feel like the planning process is going into too much detail, it probably is. As a general rule of thumb, we feel that any plan with more than 300 tasks threatens to become unwieldy and of questionable value. Remember that a good project plan should create stable priorities, not detailed instructions. A plan that doesn't leave space for individual creativity and management initiative is a plan that most project teams will eventually ignore.
Firstborns are twice as likely to reject a new scientific idea than their laterborn siblings are.
Sulloway noted that not every scientist accepted new theories that eventually became widely accepted. He wondered what might make the difference between levels of willingness to accept theories as varied as Copernicus' theory of revolution, Harvey's theory of blood circulation and Darwin's theory of evolution. Of all the determinants he studied, the strongest predictor turned out to be birth order. One possible explanation for this is that firstborns are more closely supervised, or more carefully inculcated with the status quo, given their proximity to parents. Laterborns are less vested in the status quo and more ready to accept theories that change it.