diff --git a/README.md b/README.md
index 0559065..7b45e86 100644
--- a/README.md
+++ b/README.md
@@ -2,13 +2,17 @@
 
 ## requirements
 
-`$TODOTXTPATH` needs to be set to your todo.txt path
+`$TODOTXTPATH` needs to be set to your todo.txt path.
 : `export TODOTXTPATH=~/todo.txt`
 
-`$VIMWIKIPATH` needs to be set to your vim wiki path
+`$VIMWIKIPATH` needs to be set to your vim wiki path.
 : `export VIMWIKIPATH=~/wiki`
 
+`$MYVIMRC` needs to be set to your vimrc path.
+: `export MYVIMRC=~/.vimrc`
+
 ## usage
 
 - ./dev-env.sh xn -> extract notes 
 - ./dev-env.sh sn -> store notes
+- ./dev-env.sh tmux -> open default tmux env
diff --git a/dev-env.sh b/dev-env.sh
index 55844d4..9864e53 100755
--- a/dev-env.sh
+++ b/dev-env.sh
@@ -1,15 +1,23 @@
 #!/bin/sh
 
+_notes_locations_print()
+{
+	echo "\t\ttodo.txt:\t$TODOTXTPATH"
+	echo "\t\twiki:\t\t$VIMWIKIPATH"
+	echo "\t\tvimrc\t\t$MYVIMRC"
+}
 
 _help()
 {
 	echo "dev-env.sh usage: $0 [mode]"
-	echo "\txn: Extract notes to $TODOTXTPATH and $VIMWIKIPATH."
-	echo "\tsn: Store notes from $TODOTXTPATH and $VIMWIKIPATH."
+	echo "\txn: Extract notes to:"
+	_notes_locations_print
+	echo "\tsn: Store notes:"
+	_notes_locations_print
+	echo "\ttmux: Launch standard tmux session."
 	exit 1
 }
 
-
 _extract_notes()
 {
 	if [ ! -e "./archive.tar.gz" ];
@@ -39,6 +47,16 @@ _storage_notes()
 	exit 0
 }
 
+_launch_tmux()
+{
+	tmux new-session -d 'vim $TODOTXTPATH $VIMWIKIPATH/index.md'
+	tmux new-window 'bash'
+	tmux -2 attach-session -d
+}
+
+# main
+
+# check for the neccessary variables
 
 if [ -z "$VIMWIKIPATH" ];
 then 
@@ -52,10 +70,18 @@ then
 	exit 1
 fi
 
+if [ -z "$MYVIMRC" ];
+then 
+	echo "MYVIMRC not set."
+	exit 1
+fi
+
+# run the user's command
 
 case "$1" in
 	sn ) _storage_notes ;;
 	xn ) _extract_notes ;;
+	tmux ) _launch_tmux ;;
 	* ) _help ;;
 esac