In real life, if we want to accomplish a work. It mostly consists of many tasks associated with it. But there will be some tasks which you need to do only when some other task is completed.

The biggest problem is that I dont want to create tag or list for each work which involves conditional tasks.

So, Whenever I create a task which involves conditional task, I associate it with a tag "++". To indicate it has conditional tasks associated with it. And will add the conditional tasks in notes.

The advantage is that even if you forgotten about creating conditional tasks, you can always check the completed tasks in that tags, and create associated conditional tasks.

Hope it helps you guys :-)