You can get a happiest live if you apply this simple rules in your days
In Islamic Psychology, these rules is also taught universally
These are very complicate but it’ll never bother us if we did by ikhlas, just because of Allah and just because want a rida from Allah, insya Allah
First, loving Allah.
Second, Always do GOODNESS (Amar ma’ruf hahi mungkar).
Third, always asking forgiveness to Allah and give your forgive to someone who ever or never hurts you.
Fourth, harm NO ONE. When you make a goodness or badness, the impact will also return to you.
Fifth, be positive in thinking, feeling, sensing and others. Always keep husnudzan even if you meet with something you dislike or when you get a calamity.