Lots of links for clothing in this thread - http://modthesims.info/showthread.php?t=572134
Current new hairstyles - https://www.thesimsresource.com/downloads/browse/category/sims3-hair/
Hair can be tricky as you don't really know what it looks like till your sim is sprouting it from it's head so I like to use this - https://docs.google.com/spreadsheets/d/1qBa59yKIUPuzGJS8KJ7s7IHLxaOZkNChK_pK4PLUI3o/edit#gid=0 - then I find a redo by others. This is a good one too - http://r2mcreations.blogspot.com/search/label/female%20hair#/page/1 - has some styles that are "fixed" (especially for guys).
Nice eyebrows are essential. There are some good ones here - https://kurasoberina.tumblr.com/post/159837823959/old-misc-makeup-dump
(not sure if the links still work)
Makeup - my favorite is - https://www.thesimsresource.com/artists/Gosik/downloads/browse/category/sims3-makeup/
Eyeliner, eyeshadow all helps. You can also find freckles and beauty marks by the same person. Very nice and subtle.
Although I've never used them, sliders are another way to give your sim different, non-pudding looks. Google is your friend.