diff --git a/Coding-style-guide.md b/Coding-style-guide.md
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--- a/Coding-style-guide.md
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@@ -1,5 +1,41 @@
-* lower_case with underscores
-* no CamelCase
-* GLOBAL_VARIABLES
 
-* ...
\ No newline at end of file
+## Variables
+
+Meaningful self documenting names should be used, if the variable name does not make it reasonably obvious as to the meaning, appropriate comments should be added.
+
+Preferred naming convention is to use `snake_case` names, and not `CamelCase` or `somethingElse`.
+
+`ALL_CAPS` is reserved for globals, any local variables should be in `snake_case`
+
+Variables name should not clobber command names, such as `dir`, `pwd`
+
+
+## Functions
+
+Braces should be on the same line as the function name:
+
+    helpful() {
+      ...
+    }
+
+Private or utility functions should be prefixed with an underscore:
+
+    _helper_util() {
+      ...
+    }
+
+
+## General
+
+Indenting should be done with 2 spaces.
+
+When possible, use environment variables instead of forking a command.
+
+    $(pwd) # don't use, forks a new process
+    $PWD   # do use
+
+`if-then` statements should be on one line:
+
+    if [[ -f $1 ]]; then
+      ...
+    fi