It's common to see students having problems combining Boxing in with Kicking. Not only is it difficult to coordinate your feet with your hands (or your hands with your feet); but, it's also problematic to adjust your stance to suit a punch versus a kick.
Kickboxing students often use blocks to defend against strikes. Blocking is the least effective form of defense. First off, throwing your forearm out to meet force with force in order to stop it causes you to draw your hands away from your head and torso
Kickboxing students will often have their feet too far apart or their feet too close.The best way to check if the distance between your feet is sound is to get into your stance and bring your rear, right knee to the floor.
Kickboxing students usually stare at the target or the tool; meaning, they usually look right at the target they want to strike or they stare directly at the tool that is attacking them. Many kickboxing students are often confused over where to look when they spar.