Consider these best practices when creating indexes:

• Create separate indexes for long-term and short-term data. For example, you might need to keep security logs for one year but web access logs for only one month. Using separate indexes, you can set different data retention times for each type of data.
• Apply logical or role-based boundaries for indexes. For example, create separate indexes for different departments.
• Devise a naming convention to easily track, navigate, and organize indexes.
• To configure your data retention settings, see the best practice listed here: Manage Data Retention Settings.