...arms straight and make the most of smearing your arse cheek.
One thing possibly worth considering, following on from habrich posted, is the trade-off between footwork and you arms. The higher your feet arm the more secure they generally are, but the more strain you put on your arms. If you can keep your feet lower you will get less tired, but then the risk is you are more likely to slip. Maybe try to improve your footwork (or confidencce in it) on smears and small holds.
IO2 laybacking when he should be jamming:
Should be jamming? I was INSIDE that thing by then (and whimpering / cussing a lot).
Hello Paul, any good laybacking on Half Dome?