diff --git a/03-temperature/01-picking.py b/03-temperature/01-picking.py
index 3796445..b144aed 100644
--- a/03-temperature/01-picking.py
+++ b/03-temperature/01-picking.py
@@ -57,6 +57,7 @@ def remove(self):
 # - open a new window with plot of day temperature
 #   - fig, ax = plt.subplots()
 #   - one_day = extract_day_of_hourly(temperature, 2015, 10, 18)
-# - make picking add a label with `label_data`
+# - make picking add a label using the function `label_date` (which is
+#   already imported from the `w_helpers` module)
 
 # - use `get_gid` to filter artists instead of `is not`
diff --git a/README.md b/README.md
index 490c719..06def1f 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,17 @@ for windows
 
     $ activate mpl-tutorial
 
+### Troubleshooting
+
+Try updating conda in case you are encountering a bug that has been fixed.
+
+    $ conda update conda
+
+Try this command (UNIX and OSX only) to ensure that the shell has not cached an
+old reference to IPython. Do this after the `activate` step.
+
+    $ hash -r
+
 ### for 99-get_data
 
     $ conda install -c conda-forge cartopy proj4