ASCII SPECIAL CHARACTERS

Hold ‘alt’ then type 1 -☺ (white smiley face symbol)
Hold ‘alt’ then type 2 -☻(black smiley face symbol)
Hold ‘alt’ then type 3 – ♥ (heart symbol)
Hold ‘alt’ then type 4 – ♦ (diamond symbol)
Hold ‘alt’ then type 5 – ♣ (clubs symbol)
Hold ‘alt’ then type 6 – � (black diamond with question mark)
Hold ‘alt’ then type 7 – • (round bullet)
Hold ‘alt’ then type 8 – ◘ (block with white circle)
Hold ‘alt’ then type 9 – ○ (unfilled white circle)
Hold ‘alt’ then type 10 – ◙  (block with filled white circle)
Hold ‘alt’ then type 11 – ♂ (man symbol)
Hold ‘alt’ then type 12 – ♀ (woman symbol)
Hold ‘alt’ then type 13 – ♪  (One music note)
Hold ‘alt’ then type 14 – ♫ (Two music notes)
Hold ‘alt’ then type 15 – ☼ (sunburst)
Hold ‘alt’ then type 16 – ► (black triangle pointing right)
Hold ‘alt’ then type 17 – ◄ (black triangle pointing left)
Hold ‘alt’ then type 18 – ↕ (up and down arrows)
Hold ‘alt’ then type 19 – ‼ (bang bang, or two exclamation points…it’s one character)
Hold ‘alt’ then type 20 – ¶ (paragraph symbol)

Credit : http://www.diggz.org/index.php/2009/05/15/how-to-make-music-notes-love-hearts-and-other-cutsy-symbols-in-facebook-status-updates-and-chat/