When should freelancers start focusing on just one task and stop securing more tasks?

[Btaliat]

There will be a time when freelancers will have to streamline their tasks to just only one. They will move from having many tasks to just focusing on just only one. Doing this will gice them the opportunity to focus and give their best. When they have many tasks at hand, there is a tendency that they may not perform effectively on the jobs as expected by them compared to how they will do if they have just one. However, that one should be able to cover for other ones in term of payment.