I used to be the world's worst when it came to overwatering but years ago I changed my potting medium to a very chunky, fast draining mix (a combination of potting soil and lots of orchid bark mix, the type that has wood chips, perlite and charcoal ... drains really well and doesn't hold a lot of extra water to cause root rot.
Yep, the curly version is Chlorophytum comosum 'Bonnie'. SongofJoy has a great photo in the database:
