Jegs and Summit have free shipping at a certain price point. I try to order in lump purchases to take advantage of that. If I'm close I'll think about what I'll need eventually (but not right now) and tack it on to get the free ship.
What I really want is to buy locally, but a lot of places just don't stock deep enough to have something I need. I loved the days of holding the thing you needed in your hands and making a decision based on your knowledge that it would fit/work. Now you just pray the photo they show is what the damn thing will actually look like.
It used to be that different auto stores stocked different brands and you could get a wider selection of goods (spray paint, etc.), now they pretty much all look the same.
Look at me getting all nostalgic.
Hutch