Bokken

A & B in left hanmi. Both raise bokken's overhead, piercing heavens. A cuts down at B's knee. B cuts down to block the cut. Then B raises his bokken to cut A's wrists. A passes his bokken underneath B's bokken and tsukis at B. B steps back and parries the tsuki. B's bokken should point directly into A's throat. A steps across line and strikes yokomen. B steps back and takes A's center.

A & B in left hanmi. Both raise bokken's overhead, piercing heavens. A cuts down at B's knee. B cuts down to block the cut. Then B raises his bokken to cut A's wrists. A passes his bokken underneath B's bokken and tsukis at B. B steps into A and parries the tsuki. B's bokken should point directly into A's throat. B's left hand grabs A's wrist and does kotegaeshi. Strike A with the bokken as you throw. 

Keep elbows in tight when blocking; if you draw a line between your hips, your elbows should be parallel to that line.

When you strike yokomen, move your left forearm fwd. Don't raise your elbow. Do this exercise - with your bokken in normal position, your partner blocks your bokken to your right. Look at your left forearm - that is the position to be in when you start your yokomen.

Demo - stand in rt hanmi with bokken in normal position. Your partner steps and strikes yokomen to your temple. If you step back with your rt foot so you are off the original line, you will be in mutual kill. Now if you step back with your rt foot and end up on the original line of attack, you take uke's center and he cannot cut you; it is no longer a mutual kill.

When you step back with rt foot into left hanmi, keep your left foot unweighted. Do this for bokken and normal aikido practice without bokken.

When you move, your hips move first, then your feet. Moving your hips will move the bokken to the correct position.

Bokken

Both start in rt hanmi, both step back with rt foot so both are now in left hanmi (switch feet) (the bokkens are touching on their right sides; normally we start with bokken touching on their left sides.) . A steps across line and strikes yokomen on B's left side. B steps back with left foot and takes uke's center. (The bokkens stick at this point for the upcoming parry/tsuki. Normally when nage takes uke's center, uke's bokken moves a few inches to the side. Uke holds it there until he counter strikes) B pushes A's bokken to the B's ledt side, bringing B's bokken back toward A. (this is the start of a tsuki at A). A steps across the line, passes his bokken underneath B's bokken and tsukis at B. B steps back with his rt foot and parries A's strike. B must keep his bokken tip pointed at A's throat. Both A and B should have their fwd shoulders fwd and their rear shoulders pulled back, so as to present as small a target as possible. Your hips should not be square to the original line of attacke. A steps across line and strikes yokomen. B steps back on line and takes A's center, moving fwd into A.

Standing far apart, A strikes quickly on one side or another. B strikes or parries to the other side.

kokyu ho - keep the knife edges of your hands pointed fwd throughout the whole movement. Experiment doing it both ways to see the difference.

one hand up and one hand down in most techniques - when doing katate tori shihonage & your left hand is held, grab uke's wrist by putting your right hand on top, instead of from underneath. That way your right hand is available to do atemi if necessary. (this is not the greatest example, but keep this general principal in mind)

ushiro ryotetori kotegaeishi - keep your hand on your butt as you turn your hips. This gives you more power and will also pull uke off balance. Also drop/lower your hips when you do the hip turn. Nage's hand that does not grab uke's wrist - make a fist and rotate it upwards to help break free of the grip.