What is the best practice for backing up a database in Simple mode?
I'd recommend Ola's scripts for SQL Server maintenance - backups, re-indexing, checkDB, house-keeping, everything! It takes care of naming conventions too! They are very clever, and award winning too!!!! :)

Personally, if your databases are small, I'd keep to a full daily backup schedule. I believe Microsoft recommend that as well - simplicity is best approach.

Ola's scripts:
http://ola.hallengren.com/