Turn on 'toggle open' to automatically open/unlock doors when walking. Purchase a keyring at the general store in Miragon and add your keys to it so your inventory doesn't get cluttered with keys.
Use the 'explore' command to see what percentage of the area/world you have already explored. Turn on 'toggle explore' to display the number of rooms you have explored in the area you are standing in. If you have the game map on (toggle map to turn this on or off), bright colors on the map mean you have explored a room whereas dark colors mean you have yet to enter a room.
To get to another area, use the runto command.