If you've got fine hair and don't want tto do the the blow drying/curling routine then you've GOT to go all one length. I think the magazines are always recommending chin-length bobs for fine, straight hair. You will still have to blow dry to put some *lift* in the root areas, but you can avoid the curling iron. If you have layers (like I do) you really cannot get away with not doing them. It stinks, I know.
As for products, they can make or break my hair style. If I use nothing or storebought stuff, the hair just flops. I have had really good luck with Aveda Products. Right now I am using Sap Moss Styling Spray at the roots for volume. It really does a nice job. I then use some Aveda Control Paste to give it a "tousled" look. I find that if you just let it be kind of smooth, it looks more fine. The tousled, messy looks makes it look thicker.
Also, I wanted to add that highlights really help with the texture.