I have found that the things that have been most helpful as I learn CL are<p><pre><code> C-c C-d d ;; Describe symbol that the cursor is on
C-c C-d h ;; Open up the hyperspec entry for the current symbol
</code></pre>
and<p><pre><code> C-c C-d a ;; Search symbols and documentation
</code></pre>
in SLIME.