diff --git a/README.md b/README.md
index 61c286c..9764479 100644
--- a/README.md
+++ b/README.md
@@ -32,18 +32,42 @@ Matrix.
 
 ## Usage
 
-From the repository root:
+There are two main import patterns:
+
+- One-off archival import: For when you have a large set of messages to import
+  for a service that you don't use very much anymore.
+- Recurring import: For when you are still using the service, and want to
+  import on a recurring basis.
+
+This program will be default not overwrite existing files, as the user might
+have modified it.
+
+Special consideration must be taking for recurring imports if you expect to be
+modifying the resulting files, for example if you are inserting links
+using Obsidian's unlinked mentions feature. You might want to use the
+`--skip-this-period` flag to avoid importing the current period until it has
+become the last period. That way you won't accidentally modify the log, because
+it has been finalized.
+
+### One-off
+
+This is the recommended command for the one-off case:
 
 ```bash
 python -m libpurple_to_markdown LOG_DIRECTORY --output OUTPUT_FOLDER
 ```
 
-It was made specifically for import into Obsidian, so it might not suite your
-purposes, but it shouldn't be too difficult to adjust the formatting code.
+### Recurring
+
+This is the recommended command for the recurring import case:
+
+```bash
+python -m libpurple_to_markdown LOG_DIRECTORY --output OUTPUT_FOLDER --skip-this-period --period month
+```
 
 ## TODO
 
-- [ ] Decode MMS parts and reconstruct image attachments.
+- [ ] SyncTech: Decode MMS parts and reconstruct image attachments.
 
 
 ## Dependencies
diff --git a/setup.py b/setup.py
index 5bb2bf5..9503ed3 100644
--- a/setup.py
+++ b/setup.py
@@ -39,18 +39,42 @@ Matrix.
 
 ## Usage
 
-From the repository root:
+There are two main import patterns:
+
+- One-off archival import: For when you have a large set of messages to import
+  for a service that you don't use very much anymore.
+- Recurring import: For when you are still using the service, and want to
+  import on a recurring basis.
+
+This program will be default not overwrite existing files, as the user might
+have modified it.
+
+Special consideration must be taking for recurring imports if you expect to be
+modifying the resulting files, for example if you are inserting links
+using Obsidian's unlinked mentions feature. You might want to use the
+`--skip-this-period` flag to avoid importing the current period until it has
+become the last period. That way you won't accidentally modify the log, because
+it has been finalized.
+
+### One-off
+
+This is the recommended command for the one-off case:
 
 ```bash
 python -m libpurple_to_markdown LOG_DIRECTORY --output OUTPUT_FOLDER
 ```
 
-It was made specifically for import into Obsidian, so it might not suite your
-purposes, but it shouldn't be too difficult to adjust the formatting code.
+### Recurring
+
+This is the recommended command for the recurring import case:
+
+```bash
+python -m libpurple_to_markdown LOG_DIRECTORY --output OUTPUT_FOLDER --skip-this-period --period month
+```
 
 ## TODO
 
-- [ ] Decode MMS parts and reconstruct image attachments.
+- [ ] SyncTech: Decode MMS parts and reconstruct image attachments.
 """.strip()
 
 PACKAGE_DESCRIPTION_SHORT = """