You use the available cover, you utilise folds in the ground, shell holes, hills, abandoned trenches, anything that will keep you below the the bullets, shell fragments and shrapnel whizzing about. Besides that, there is very little you, as an infantrymen in 1916, can do.

Successful attacks on the Western Front usually occurred when defenders were successfully suppressed by continuous artillery fire, machine gun barrages or a combination of both. Without these, infantry assaults on entrenched positions were more often then not doomed to fail.