In general I utilise a selection of exercises per body part which I rotate into and out of my routine. For larger bodyparts like Quadriceps or Lats I might use 3-5 exercises at any one time whilst for smaller bodyparts such as Biceps or Calves I might use 2 or 3 at any one time.
This way my routine is constantly kept fresh yet at the same time focused. Muscles are also constantly being hit by slightly different angles. Whilst almost all weight exercises (and there are several thousand possible variations) offer something slightly different the following are my personal favourites which are staples of my routine.
Calves
Calves are (two) muscles which have a very short range of motion so when we train them we focus on maximising the time under tension so as to stimulate growth.
Standing Calf Raises (on calf platform).
Quadriceps
Dumbbell squats
Dumbbell lunges
Hamstrings
Romanian Deadlifts with Dumbbells (engages Glutes too)
Glutes
Hip thrusts with barbell
Forearms
Wrist Curl
Reverse Wrist Curl
Biceps
EZ Bar Barbell Curl (The EZ bar puts less pressure on your wrists and forearms).
Hammer curls (targets the long head of the bicep as well as the brachialis (another muscle in the upper arm) and the brachioradialis (one of the key forearm muscles)).
Triceps
Tricep cable rope pushdown
Deltoids
Rear delt reverse flys
Lateral raises
Traps
Standing dumbbell shrugs
Lats
Lat pulldown
Bent over barbell rows
Pecs
Dumbbell flys
Incline dumbbell bench press
Abs
Elbow plank