Some sites are dated but still have useful information.

cw joke

AC6V CW Operating Aids

Many Excellent Links

Morse Code Resource Center

Telegraph Lore

Here are some links to books on learning the Code, using different approaches, that might be helpful:

cw cartoon

ABCs of Morse Code Operating

CW Way of Life

The Art and Skill of Radio-Telegraphy

Zen and The Art Of Radiotelegraphy