E|--2---|
B|--3---|
G|--2---|
D|--0---|
A|--X---|
E|--X---|

What's that X? The 'X' means this string is not played.
How to play a D chord:
1. Place your 1st finger on the 2nd fret of the 3rd string.
2. Place your 3rd finger on the 3rd fret of the 2nd string.
3. Place your 2nd finger on the 2nd fret of the 1st string.
4. Strum down from the 4th string.

This chord is not all that hard, however, at first your fingers might feel a bit "scrunched". Remember to keep your fingers arched so that your third finger does not rest on the first string. The easiest way to arch to your fingers is to move your thumb down (as in down towards the floor) on the back of the guitar neck.

E|--0---| 
B|--1---| 
G|--0---|  
D|--2---|  
A|--3---|  
E|--X---|  
C Chord Tab

How to play a C chord:
1. Place your 1st finger on the 1st fret of the 2nd string.
2. Place your 2nd finger on the 2nd fret of the 4th string.
3. Place your 3rd finger on the 3rd fret of the 5th string.
4. Strum down from the 5th string.

Notes: Make sure your 1st finger is on the second string. This chord can throw a curve ball to beginners because you are not supposed to play the 6th string. In my opinion, I wouldn't be overly concerned about avoiding the sixth string. As you get better at playing the guitar this should become easier. When learning this chord, try to avoid looking at your guitar to place the pick. Stopping to look down to place the pick takes too much time and it's more important to get good at transitioning to and from the chord.

Practice this chord, then make sure you practice transitioning by playing other chords before and after this one.

E|--3---|
B|--0---|
G|--0---|
D|--0---|
A|--2---|
E|--3---|
G Chord Tab

How play a G Chord:
1. Place your 2nd finger on the 3rd fret of the 6th string.
2. Place your 1st finger on the 2nd fret of the 5th string.
3. Place your 4th finger on the 3rd fret of the 1st string.
4. Strum down from the 6th string.

This is the first chord to use all four fingers. Remember to keep your fingers arched so that you don't mute other strings. If you have trouble due to muting other strings, then lower your thumb on the back of the neck.