Blessing Born of Gratitude
The Kohanim bless Klal Yisroel not as channels but as people who feel thankful and speak from that thankfulness.
The Torah commands the Kohanim, "So shall you bless the children of Israel, say to them." The Lisa Rav asks why the verse says to say it. When Avraham blessed Yitzchak, the one who blesses is a spring and a channel through which holiness flows to the one who is blessed. The Kohanim are not meant to be that kind of channel. Instead, the Torah taught the Kohanim to feel grateful to Yisroel for the twenty-four gifts of the priesthood. Their words are a statement of faith: in return for all that you give us, Hashem will surely bless you. The Kohanim have only the merit of being allowed to mention Hashem's name in their greeting, which is not permitted to everyone. That is why the verse ends, "and I will bless them." The true source of the blessing is Hashem Himself.
Source: Nachalas Yaakov, Bamidbar (Naso, Birkas Kohanim)
Gratitude is where a blessing starts. Pick someone who gives to you regularly, a teacher, a rav, a cleaner, a parent or a neighbour, and thank them in specific words today. Name what they did and what difference it made. Then add a sincere wish for them: may Hashem give you good health, or peace of mind, or joy in your children. A blessing that grows out of real thanks is not a formula, and the person receiving it will feel the difference.