Add icon or image beside sidebar title

1. Dashboard >> Design >> Edit HTML


2. CTRL+F to find
]]>

3. after found it, copy the code below and paste before the code above
.sidebar h2 {
background:url(URL OF HOSTED PIC);
background-repeat: no-repeat;
background-position:left center;
height:25px; margin:0;
padding:10px 3px 0 30px;
line-height:1.5em;
text-transform:uppercase;
letter-spacing:.2em;
}
]]>

4. Save it and DONE.