OTOSHI
O soto otoshi - Major outer drop
Tai otoshi - Body drop
Seio otoshi - Shoulder drop
Block to the inside and step with right foot to uke's left foot.  Grip uke's elbow with left hand and put right hand around neck.
Step right around with left foot, pivoting on ball of right foot and pull uke around and down over your leg.

As an alternative to putting your right hand around the uke's neck, you can also grip the lapel or the sleeve to get different degrees of control over their body.
Dropping throws
Block to the inside and step with right foot to uke's left foot.  Grip uke's elbow with left hand and put right arm under shoulder..
Step right around with left foot, pivoting on ball of right foot and pull uke around and down over your leg.
Block to the inside and step with you right leg so that your foot is behind and between uke's legs. 
Holding onto their chin or lapel, walk forward so that they fall down.