Question: Baal HaSulam writes that we need to increase love for our friends because this is enough to compensate for all your deficiencies. How can we practically implement this advice?

Answer: This is something that friends must decide among themselves. When you start to reveal the faults in your unity, everything will work out accordingly.

Question: But love for friends seems like some kind of ephemeral feeling. How can we increase it among ourselves?

Answer: As it is said: “Love covers all transgressions.” Everyone in the group checks themselves and their attitude toward each friend, and then they see what needs to be corrected. This is your work for today.
[332491]
From the Daily Kabbalah Lesson 7/27/24, Writings of Baal HaSulam Letter No. 13

Related Material:
A Deficiency Worthy Of Our Effort
How Can We Correct Evil?
Atonement, The First Step To Correction