Posing looks good
On the side tri - put your legs the same way as you do w/ the side chest - dont' lock out your back leg. Also make sure you do the whole 'roll' thing w/ the tri pose - roll your shoulder forward to back - remember that on stage you need to show the WHOLE row of judges and WHOLE audience so show 'em everything. Also gives you a totally cool chance to show off the shoulder striations that pop at various angles.
Lat spreads are a bitch. I have to start by sticking my arms behind my back and sticking my thumbs all the way to my spine. Then roll shoulders back / chest up like a cable row and pull out from the widest point in your back - I used to try to pull my shoulders up to get the flare out, but if you can visualize the lats, like right under your shoulders flaring out. Another way you might feel it more is if you visualize like how the ridiculously hyuge BB guys do those step-wise flare outs - like roll it out in steps where it keeps getting bigger & bigger? Hard to describe....
Abs & thighs - these are great for showing off a whole bunch of different angles - make sure you do a lock out on your legs - that's the best time you get to show off a nice quadsweep and any striations that may show up...