One of the biggest improvements for me was realizing that sugar absorbs flavors and aromas the same way that tea does, so removing the sugar from paper packaging and getting it into something else as soon as possible helps, as the paper does not protect it and tends to add its own flavor over time.
Even though they are the teabags of sugar in some ways, I quite like sugar cubes, I think because there is no worry about clumping or using desiccators like with loose sugar, even though this means that sometimes I find myself in a spot where the tea needs some amount more or less than a cube. Apparently the sugar cube was invented in the town of Dačice in the Czech Republic, which used to be home to a beet-sugar factory; they have a monument there commemorating the event.
