When I'm taking the car I usually have a tote bag for things I need to deliver or pick up, or to use as a shopping bag. If I'm in my businesswoman's role I'll carry a briefcase for papers. Pick and choose and then sew only the pockets you think you'll use. Maybe you need only one large and one small pocket on each side. Add an underarm pocket for ticket jackets only if you take public transportation.
Fewer pockets present less temptation to overload the jacket.
Add some sort of secure closure to the pocket you'll use for money. Always load your cosmetics pocket with lipstick and comb. You get the picture. Build your travel wardrobe around 2 main colors plus an accent color and you'll need to pack fewer garment . It is possible to pack too little, but more probable that you are one of those who takes twice as many clothes as you need or will wear.