Offer Metta to yourself anytime, anywhere.  All the time, everywhere.  Metta meditation can be dome anywhere, anytime. Begin by offering yourself heartfelt, sincere lovingkindness.  A wish for the heart, soul, mind and body.  Here’s one of my personal favorites:

May I be filled with lovingkindness

May I be safe from inner and outer harm

May I be well in body and mind

May I be at ease and happy

You should always feel free to customize, change it up however and whenever you see fit.  This practice is for you, make it your own. 

Namaste Peace Shalom Shanti Salaam