How often or to what degree do you use biblical commentaries when you preach?

• My sermons are cut-n-paste from a commentary with a few stories thrown in.

• I always look at a commentary when writing my sermons.

• I usually use a commentary.

• I sometimes use a commentary.

• I rarely use a commentary.

• Commenataries? I'm using one under my short leg to keep my desk level.

• Other: