There's a very nice 5 minute Metta instruction (loving kindness/goodwill towards others) from Ajahn Jayasaro on YouTube which many people find beneficial:
https://www.youtube.com/watch?v=g3_lqd4Sgfc
and also there's an audio about Metta meditation from Ajahn Sucitto for anyone who's interested:
http://www.cittaviveka.org/index.php/teaching/audio-talks/266-ajahn-sucitto-instructed-metta-meditation
Hope you find them beneficial.
Best wishes,
Sam