How-To Assembly Lines Save Time!
Whenever I have to do more than one of anything, whether it's decorating a bunch of cupcakes, monogramming several bags, or making Christmas stockings for my nieces and nephews, I've found it goes much faster if I do everything in an assembly line.
For example, if I'm making similar dresses for little girls, I would cut everything out at the same time, ruffle all the ruffles, iron on all the interfacing, and assemble them all at once--doing the same step for each dress before moving on.
The assembly line saves you time because you don't have to move between steps each time, you only do each once. You also only think about each step once. If something is confusing, you don't have to figure it out each time!