link tasks together
Link tasks, so that once a task is done, it shows the next task in the series
Peter Lawrance commented
This suggestion is the same as "Nested Tasks" wgich has hundreds of votes. Consider merging them.
Would also be great if it could act as a workflow (ie If Bob does task 1 and Charlie is scheduled to do task 2 in the series, it makes task 2 come up under "Today" for Charlie.