Learn about fabric quality and content. Inappropriate goods cause endless frustration and disappointing results.
Metaphor: my mother was, no kidding, one of the world's best pie makers--- except apple, because she never would accept that some varieties make pitiful pies. No matter how skillful the mixing of the crust, the sugar, the spices, the baking time, if you don't know how to pick the right apple you're never going to have the result you want.