I don’t think in terms of a practice of that. In a deeper sense, compassion or love is a unitary entity and when we really love it radiates out to all naturally and without ego effort includes a right sense of self, or self-esteem—this latter is not the same as “self love.” See my blog post for further development of this: The Paradox of Self Love.
Love is undermined by self-hate, but self-love is not the same as self-esteem and it is a mistake, I think, to emotionalize about loving oneself or to focus on that. See the exposition of the issue here: What the Self-Esteem Movement Got Disastrously Wrong | Dan Sanchez
There is actually some research on this theme: Does Self-Love Lead to Love for Others?, and it concludes with:
“Does loving oneself lead to loving others? The answer is not the simple “ yes ” often noted in popular discourse. In fact, the opposite is often the case. Self-love as operationalized as narcissism is linked to game playing and selfishness in romantic relationships.Narcissists look to relationships as a source of power or control — not as an arena for experiencing and expressing commitment.Narcissism does not lead to loving others in any interpersonally positive sense of the contrast, the implications of self-esteem for loving others are generally positive but are still mixed. High self-esteem individuals may be resistant to negative experiences of love sickness. How-ever, they may also miss the highs associated with manic love.These individuals also report greater passionate sum, the ego can be as much of a hindrance to romantic relationships as it can be a help. Individuals looking to experience love may be best served by turning out toward the other rather than turning in toward the self.”
Mystic Muse 