Simply, copy and paste these codes. If you want a heart, copy and paste ♥ and when you preview it, it will look like ♥.

CODE    PREVIEW    NAME

‘    ‘    left single quote

’    ’    right single quote

‚    ‚    single low-9 quote

“    “    left double quote

”    ”    right double quote

„    „    double low-9 quote

†    †    dagger

‡    ‡    double dagger

‰    ‰    per mill sign

‹    ‹    single left-pointing angle quote

›    ›    single right-pointing angle quote

♠    ♠    black spade suit

♣    ♣    black club suit

♥    ♥    black heart suit

♦    ♦    black diamond suit

‾    ‾    overline, = spacing overscore

←    ←    leftward arrow

↑    ↑    upward arrow

→    →    rightward arrow

↓    ↓    downward arrow

™    ™    trademark sign