Hersh Goldwurm

XIX-18.
לא תקם ולא תטר את בני עמך ואהבת לרעך כמוך אני ה
Do not take revenge and do not bear a grudge against the members of your people ; you shall love your fellow as yourself - I am HASHEM.
(...)
HaKsav Vhakabbalah offers a list of practical applications of this abstract-sounding commandment :
a) Your affection for others should be real, not feigned.
b) Always treat other whith respect.
c) Always seek the best for them.
d) Join in their pain.
e) Greet them with friendliness.
f) Give them the benefit of the doubt.
g) Assist them physically, even in matters that are not very difficult.
h) Be ready to assist with small or moderate loans and gifts.
i) Do not consider yourself better than them.

The point of this list is to give realistic examples of how one can fulfill this commandment in ways that are possible. As Ramban notes, only the saintliest people can literally love others as much as they love themselves, but everyone can train himself to treat others with respect and consideration.

(extrait pp. 348-349)