By far one of my favorites, Exalted Warrior gives me the joyous feeling of lifting up praises to heaven. 

• Start in Downward Facing Dog.
• Bring your right foot through and place it between your hands.
• Look at your back foot. Plant it at a 90 degree angle on your mat, and line up the instep with the heel of the front foot. 
• Windmill the hands and torso back and up, finding Warrior II. Keep a deep bend in the front knee, without letting the knee go past your heel (you should still be able to see your toes).
• Now lift your right hand high while lowering your left and sliding it down the back of your thigh. 
• Bring your gaze heavenward while lifting the heart in praise & thanksgiving.

Downward Facing Dog, or just Down Dog, is another foundational yoga pose. From the base of this posture, the yogi transitions to many others. Done often and properly, it can even be a resting pose.

It brings oxygen to the brain and increased blood flow to the body. It elongates the neck and spine. The hamstrings, calves and Achilles tendon gain flexibility in this pose. The wrists, arms, shoulders and abs gain strength.

• Begin in a standing Forward Fold. Bend your knees, placing your hands on the mat.
• Step back about four feet. You should look like a tent or an upside-down letter "V".
• Line up the index fingers so they are parallel to the sides of your mat. This will assist you in turning the eyes of the elbows forward. Spread your fingers wide and distribute your weight on the four corners of your hand. Have straight arms but don't lock the elbows.
• Press the mat away from you and lower your shoulders, opening the heart towards the floor. Let your arms and torso be on the same plane.
• Maintain a flat back, hinging at the hip crease. It is more important to have a flat back than to have straight legs or heels touching the floor.
• Knit your ribs together, bringing in your belly like you are tightening a corset.
• Press your thighs back without locking the knees.
• Let your head be a natural extension of the spine, on the same plane as the torso/arms. This allows you to extend the crown of the head forward to elongate the neck. Another option is to let the head hang, and shake it gently yes and no.
• Breathe deeply and steadily, in and out through the nose.

• Begin in Plank Pose.
• Place one hand under your face, directly in the center of the mat. Spread your fingers wide and distribute your weight on a four corners of the hand.
• Lift your other hand towards the sky. Don't collapse the bottom shoulder.
• Turn over to the side, balancing on the blade of the lower foot.
• Concentrate on lifting the top hip skyward.
• Breathe.

A typical modification for this pose is to put one knee on the floor. This is excellent for those who do not yet have the strength for a full Side Plank.

Definitely a power house pose, Plank is great work for the transverse abs -- your primary posture muscles. It also strengthens the front of the legs, arms (if you don't lock your elbows), and shoulders.

• Begin in a table top position, on your hands and knees.
• Place your hands directly under your shoulders. Turn the eyes of the elbows forward. Don't lock the elbows.
• Step the feet back and straighten the legs.
• Lower the hips until your torso is on the same plane as your legs, making you look like a plank of wood.
• Make sure you are not dumping your weight into the shoulders. Engage them instead.
• Engage and lift in the belly.
• Look down at the mat between your hands. Breathe.

Forward fold turns the practitioner inward and promotes relaxation. The intense compression then release of the digestive organs allows for a fresh flood of blood and a loosening and release of toxins into the blood stream. It also helps move things along through the intestines. It takes the pressure off of the lower spine and elongates the back, often relieving pain. Uttanasana brings blood and oxygen to the brain. And, of course, it brings more flexibility to the hamstrings.

• Begin in Mountain Pose.
• Keeping a straight back, fold forward hinging at the hips.
• Inhale, coming halfway up, as pictured below. Elongate the spine by bringing the crown of the head forward and tailbone back.
• Press your lower ribs back and cave in your belly as you exhale and fold again. 

It is not necessary to fold completely in half with straight legs. Far more important is to maintain a flat back. If that means you have to bend your knees because there is not enough space in the hamstrings, then by all means bend your knees.  

• Begin standing with feet hip bone distance apart and weight centered on all four corners of the feet. Sit down like you would in a chair.
• Maintain strong abs, engaging the transverse abdominus muscles by imagining you have a corset/weight lifting belt on, and you are cinching it tighter.
• Press your ribs back towards an invisible wall behind you.
• Roll your shoulders back and bring your hands to heart center in Anjali Mudra (Prayer Hands).  
• Gaze forward. Breathe.

Some things to remember:

You can adjust how low you sit down to your capabilities, as long as you do not bend the knees greater than 90 degrees.

To make the pose more challenging, try coming up onto the balls of the feet or letting the weight come back into the heels and lifting the toes.