diff --git a/README.md b/README.md
index 2f2181e..6aa490b 100644
--- a/README.md
+++ b/README.md
@@ -90,41 +90,44 @@ help
     exit
 ```
 
-You can also specify the number of samples to draw when algebraic manipulations are not sufficient: 
+## Tips & tricks
+
+- It's conceptually clearer to have all the multiplications first and then all the divisions
+- For things between 0 and 1, consider using a beta distribution
+
+### Command line options
+
+You can specify the number of samples to draw when algebraic manipulations are not sufficient: 
 
 ```
 $ fermi -n 1000000
 $ fermi -n 1_000_000
 ```
 
-## Tips & tricks
-
-- It's conceptually clearer to have all the multiplications first and then all the divisions
-- For things between 0 and 1, consider using a beta distribution
+You also run a file with the -f option
 
+```
+$ fermi -f more/piano-tuners.fermi 
+```
 
 ### Integrations with linux utilities
 
-Because the model reads from standard input, you can pipe a model to it:
+Because the model reads from standard input, you can a model to it:
 
 ```
-$ cat more/piano-tuners.f | fermi
+$ cat more/piano-tuners.fermi | fermi
 ```
 
-You can also 
-
-...which means a model an executable file by adding the following at the top!
+You can make a model an executable file by running `$ chmod -x model.fermi` and then adding the following at the top!
 
 ```
 #!/bin/usr/fermi -f
 ```
 
-
 You can save a session to a logfile with tee:
 
 ```
 fermi | tee -a fermi.log
-
 ```
 
 ## Different levels of complexity