I made this up myself a while back, just thought I'd share:

>The key to this riddle is only for you  
Below are instructions, above this the clue  
First strike the one near the head of a year  
Then remove he who begins a cheer  
Next take away the end of a tunnel  
Then let us go to solve this puzzle  
What you first took you must now take again  
With three you are left, but fret not dear friend  
Fattest to front and thinnest to rear  
Add in two "eyes" and all becomes clear  
  
Like the title says (I'm not very good with titles), you're looking for a number here.