SQL Server 2005 Databse growing rapidly for mno apparant reason

Hello Experts,

I have a SQL erver 2005 database which was ibeen collecting data over the last 6 years.

The DB and log files were in the 60 Mb range a couple of months ago. I just noticed that the DB is now 1.2 Gb and growing and the Log file is at 95 Mb.

I found a table that was duplicating data every time a user's action was initiated. I did this:

1. Deleted the table
2. re-created the table
3. fixed the issue to keep the appropriate data inserting into the new table
I checked all other tables and found no similar issues...

I then shrank the DB and log file with

USE master;
DBCC SHRINKDATABASE (My_Database, 10);
GO

USE My_Database;
DBCC SHRINKFILE (My_Database_Log, 10)
GO

This got the DB size down to 540 Mb and the log file down to 15 Mb.

I still think there may be something else going on?

Does anyone know how I can get the file size down further and how to maintain it at the optimum size?

Thanks!