I wrote an article about taking less weight on tour.

Here are my 8 suggestions:

Lose weight before touring (10 pounds on you is the same as 10 pounds of gear)

Don't ride on heavy tires.

Carry things with multiple uses.

Don't carry toiletries in heavy containers.

Clothes add up.

Let the post office carry it for you.

Don't carry more water than you truly need.

Don't carry heavy food.