diff --git a/README.md b/README.md
index 4f502f9..e72f4dd 100644
--- a/README.md
+++ b/README.md
@@ -1,31 +1,37 @@
 NextAction
 ==========
 
-A more GTD-like workflow for Todoist. Uses the REST API to add and remove a `@next_action` label from tasks.
+A more GTD-like workflow for Todoist.
 
-This program looks at every list in your Todoist account.
-Any list that ends with `_` or `.` is treated specially, and processed by NextAction.
+This program looks for pre-defined tags in every list and parentless task in your Todoist account to automatically add and remove `@next_action` labels.
 
-Note that NextAction requires Todoist Premium to function properly, as labels are a premium feature.
+The result will be a clear, current and comprehensive list of next actions without the need for further thought.
+
+Uses the Todoist Sync API; note that Todoist Premium is required to function properly, since labels are used.
 
 Requirements
 ============
 
-* Python 2.7, Python 3.0+ is unsupported at the moment
+* Python 3.8
 * ```todoist-python``` package.
 
 Activating NextAction
 =====================
 
+Projects and parentless tasks can be tagged independently from each other to create the required functionality.
+
 Sequential list processing
 --------------------------
-If a project or task ends with `_`, the child tasks will be treated as a priority queue and the most important will be labeled `@next_action`.
-Importance is determined by order in the list
+If a project or task ends with `--`, the child tasks will be treated as a priority queue and the most important will be labeled `@next_action`. Importance is determined by order in the list.
 
 Parallel list processing
 ------------------------
-If a project or task name ends with `.`, the child tasks will be treated as parallel `@next_action`s.
-The waterfall processing will be applied the same way as sequential lists - every parent task will be treated as sequential. This can be overridden by appending `_` to the name of the parent task.
+If a project or task name ends with `//`, the child tasks will be treated as parallel `@next_action`s.
+A waterfall processing is applied, where the lowest possible children tasks are labelled.
+
+Parentless tasks
+------------------------
+Any parentless task can be be given a type by appending '//' or `--` to the name of the task. This works if there is no list type, and will override a previously defined list type.
 
 Executing NextAction
 ====================
@@ -38,3 +44,16 @@ Running NextAction
 NextAction will read your environment to retrieve your Todoist API key, so to run on a Linux/Mac OSX you can use the following commandline
 
     python nextaction.py -a <API Key>
+
+Additional arguments
+------------------
+
+Several arguments can be provided, for example to change the default label:
+
+    python nextaction.py -l <label>
+
+Or to change the suffix tags:
+
+    python nextaction.py --parallel_suffix <tah>
+    python nextaction.py --serial_suffix <tag>
+