From the comments:
Also give ambush time "for natural sounds around you to return to normal". Don't spook the prey with "it's quiet, too quiet." Scouts aren't random picks, they are determined eyes, nose and ears of alarm.
Beware of giving off scents, even aftershave can spook a scout and reroute a column out of your ambush.
Having rear flank spotters with a small sniper/marksmen detachment (with preferably if available high ground) can more easily pick off high value targets at the beginning of an ambush and take out more high value targets if they rout and full retreat. Having them on rear guard gives you info on "get ready". But like he said having "eyes" on flank will help in avoiding the "hook" sweep and net manuvears designed to pincer and clear ambushes.
Wired claymores aren't as effective in day (at least mud up the wire or use camo wire) as in night. Using an rfid detonater is more reliable (unless they are using signal jammers) , also look at the lay out and set layered traps, if there is a natural "cover" for enemy forces leave it as "bait" and conceal a claymore to flank the hard point leaving their troops vulnerable and disoriented continuously. "Leaving an out" is a very effective strategy in an ambush, people under stress usually fight or flight, and flight is usually path of "perceived" least resistance. Land mines/claymores/(traps basically) on a path of least resistance can be devastating.
Always make sure your team is on the same page about trap location, there is nothing more stupid than letting your own team wander into traps laid for the enemy.
Variety is the spice of victory, patterns draw "counters". Beware of becoming predictable.
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