Three core values from Bhagavad Gita (12.4) for everyone:
1. sarva bhoota hite rathaah – Seeking the welfare of all living beings; helping everyone as much as possible with an attitude of service
2. sanniyamyendriya graamam – Regulation and control over the sense organs and the mind; quality insistence and quantity moderation in eating, sleeping, working, talking and sense indulgence
3. sarvatra sama buddhayah – Having equanimity amidst the ups and downs of life; facing life with courage, perseverence, dignity and humility without being overwhelmed by failure or carried away by success
Following these three is the core of spiritual life. Without these three no amount of other disciplines make any sense or give any benefit.