While I agree that the tikkun (repair) for Sinat Chinam (hatred without a reason) is Ahavat Chinam (love for no reason) , I don’t think that most of us are capable of Ahavat Chinom because we don’t even know how to love ourselves, let alone someone else, for a reason, kal v’chomer (afortiori) for no reason.

We seem to be very good at hating for no reason, but loving for no reason, or even for a reason, is much more difficult for us.

I believe it begins with Hakaras HaTov - recognizing the good and showing gratitude.

Recognizing the good that the Ribono Shel Olam does for us.

Showing gratitude. Saying thank you. Realizing that everything is not coming to us. That we are being gifted with all types of kindness from Hashem.

Rabbi Noach Weinberg, ZT”L (of blessed memory) said to write a list of everything you are thankful for.

Rabbi, my wife, the Heiliger Chana-Chaya, says that you were the one who asked the question, “What did you do to deserve your eyes? “

Once we can incorporate that character trait into our being, into our daily lives and our every thought, that attitude of gratitude, then we can see how much Hashem loves us not for anything we did, but just because we are his creations.

Then we can begin to emulate Hashem and begin to spread Ahavat Chinam.
So it begins with Hakaras HaTov.

I agree that ahavat chinam is the cure and that we need to work to achieve this, but not just on loving ourselves and expressing our gratitude.

Our focus on the destruction of the Second Temple as we approach Tisha B'Av and our period of mourning for Rabbi Akiva's students as we approach Lag B'Omer seem, for some reason, to be the only times we really raises the issues of unwarranted hatred and love without reason.

By my thinking, this is a failing on our part and the solution lies in daily doses of chesed, giving of ourselves in loving ways to support and help others. The Nesivos Shalom writes that a day without chesed is not accounted as a day of one's existence. We need to wake up every morning attuned to our need to express our love with chesed.

The challenge for us is that we too often wait for chesed opportunities to present themselves to us when they may easily be in our backyard. Perhaps that is another point of our need to "be attentive and hear."