I can't imagine Hermione being overly fussy with her routine. In fact she's so busy with all her classes, not to mention on the hunt for Horcruxes. Famous firstly for her cool logic and brilliance but secondly for her bushy hair, Hermione prefers Nourishing Oil Care Anti-frizz Serum from Dove. It doesn't work as well as Sleakeazy's Hair Potion, but she's far too busy to brew it fortnightly, shhh don't tell. When she's in hardcore study mode she needs hair bands to keep all that hair out of her face. Foin coupe from Diptique helps her to relax. It was a gift from an aunt; it smells like one of her favourite scents, freshly cut grass.
Hermione has dry skin, and all those hours spent in the drafty library makes her skin feel like century old parchment, and lips rougher than a Norwegian Ridgeback. She combats this with Cetaphil cleanser and moisturiser. For lips she uses Korres lip butter. Hermione discovered Steam Cream while on holiday in France with her parents, ironically. It works almost like magic. Of course, dental care is of utmost importance for Hermione - her parents are dentists! Just because she lives in a castle doesn't mean she has to forgo modern-day dental hygiene.
For special occasions Hermione likes to keep it sweet and really low key. A swipe of mascara, a generous daubing of coral-peach blush and a spritz of Clean Warm Cotton EDP is all she really needs. Ron's not really big on lip gloss so if she can be bothered she'll use a little creamy lip pencil to go with the lip butter.
She keeps it all in a cat patterned travel bag from Harrods - a 16th birthday gift from her mother. You can't see but there's one on the back that looks exactly like her beloved Crookshanks.