Great advice, Michael.
That cross lane shot really helps define where the wall might be, or how flat the pattern is.
I would also suggest that waiting is the smartest thing you can do. Watching the other shots - on all the pairs you can see - is really helpful.
And - before you get to the tourney - make sure you know the relative strength of your equipment. For example - on a normal house shot, my deuce is 2 boards different (with my feet) than my inferno...
Also - any thing you know in advance (first hand, not hearsay) about the house is usually helpful - but don't let it overly influence your decisions. FOr example, if you know that House X usually plays outside 7, don't waste 3 warm up shots inside 3rd arrow. However - if house x usually plays outside 7, and you hit the shot well, and it doesn't react as you thought it would, don't waste shots outside 7, when the shot of the day may actually be 4th arrow!