I'm a minimalist packer and only take carry-on luggage. I start packing 2-3 days before a trip. I fold all my clothes and put them in neat little piles by type. Then I can just put them into my "backpack through Europe" backpack which fits into an overhead compartment and has the same capacity as those rolling luggage things. My on-plane entertainment (laptop/knitting) fits into my LL Bean backpack.
For a week long trip, I'll take a nightdress, sufficient underclothing, a top for each day, a dress or dressy top if I need it, a pair of jeans and a pair of shoes. If it's cold, one sweater and one jacket.
The only time I drag out the big suitcase is when I'm going to an Indian wedding and even then, it holds both mine and my husband's clothes.
It is entirely possible that this forum may have broken my formula and I will feel compelled to bring multiple pairs of shoes and non-jean outfits on my next trip, pushing me into the realm of the bag checkers.