yes , we can always add a activity named "No Activity" but the problem is with the time counter attached to the activity.

For example , if i create and select "No Activity" at night (guess i am sleeping) then around 8-9 hours will get added in this activity and this will also reflect into the reports.

I rather have actual hours of effort spent doing particular task (excluding above) to maintain my daily schedule effectively.

This is just what i think. what are your views ?