Tape Library backup strategy

Dears,

 Kindly I have Tape Library MSL 2024 connected to symantec Backup Exec 2012, and i have 24 Tapes (3 TB).

Can anyone help me for the best strategy and usage of the tape library in my case? . How can i deal with them to get the best practice? As it is my first time to deal with tape libraries :)

Regards,

Ahmed