A good friend sent me a copy of this excellent booklet published by the Good Book Company recently and I'd flag it up as a great resource to consider. It has 7 tips on how to engage better with a sermon when you are at the pew end - very simple and clear and full of good common sense advice. It also has a section at the end which includes advice on such things as 'How to listen to a dull sermon.'
10 of those have these at £20 for 20 of them and I have ordered a bunch for the congregation because the Word of God is the most important thing that they can take away with them from a Sunday service. Even when some idiot pastor is dishing out cash.
I'd quote some and give you more details but I've already passed on my copy. Have a look, I think it's worth it.