Database naming conventions

[eluser]davidbehler[/eluser]
After having worked with databases for many years now I have "developed" my own set of naming conventions that have worked well for me so far:

General:
- lowercase only
- no spaces: words and prefixes seperated by underscore
- no numbers: a to z and _ only!
Tables:
- short, unambiguous names
- singular names, no plural!
- avoid abbreviated, concatenated, or acronym-based names
- for linking tables: the names of the linked tables concatenated
Fields:
- prefix the name of every field with the name of the table
- primary key is always [table_name]_id (autoincrement)
- foreign key fields have the same name as the field they refer to
- date fields: [table_name]_date_[name]
- bool fields: [table_name]_is_[name]

Now I wanna know what naming conventions you use! Like me or totally different?
Depending how many people post their opinions I was thinking about writing about in my blog and comparing different naming conventions, maybe even adjusting mine to superior ones from someone else.

David