The best way is by your own example.If they see your optimism,satisfaction and your belief in this job,they will do the same.
Your persistence,your confidence and your hard work will be good motivation for them.
If you have FB account for communication with your PSA then you need to share all you've got in SFI with them.Even if it's just 2 TC Credits,they will see your success and that's also very good motivation.