I also find that airing clothes out makes a big difference. I also found that washing my gloves as frequently as possible is important because they get stinkier than socks.

I usually use a cycling backpack by Timbuk2. It's discontinued so I won't recommend the specific model. The design makes a good amount of sense, being narrow. It's comfortable to wear. One downside is that it's very floppy, so packing is an annoying activity. It's not the least bit waterproof, so I use plastic bags inside when I need to. This saves weight.