Effort!
It might be effortless for the odd person to look glamorous and well put together but for the majority, they look good because they’ve taken the time to do the things that make them look good.
Setting aside time every morning for a shower, washing or styling your hair and putting on makeup (if you’re someone who thinks looking glamorous is helped by cosmetics)
Pre planning, so not leaving the house with a bright lipstick on and forgetting to bring it with you (and powder for top ups if you get shiny), taking a brush with you and a little travel bottle of hair styling spray
Only wearing clothes that fit you and look nice
Getting your hair cut and/or coloured every couple months
Setting aside the time and money to either get your nails done or do them yourself (and removing the polish as soon as it chips instead of letting it disintegrate and look ratty)
Making the effort to maintain a healthy weight through watching what you eat/drink
Cleansing and moisturising your skin each morning and evening
To those of us who have done these things naturally our entire lives, it would feel odd not to bother. To those of us who’ve never done these things, it probably looks like a massive time drain. It’s all about what you value.