If there is an item (web-link or document or image) that you use very frequently or find very useful, should you 'star' it (as in Gmail) or 'favorite' it? Are 'marking as starred', 'liking' and 'adding to favorites' similar?
closed as not constructive by Benny Skogberg, JohnGB, JonW♦ Mar 20 at 17:21
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'star' 'exclamation mark' 'light bulb' 'tag' icons could work - depends on what you want
Liking, Starring, and Adding to favorites are really different
I would also add 'tag'-ing (like in delicious)
Alternatively, When you have a volatile list, and want to make favorites sticky, a pin is a common methaphor: