My secret for day-to-night dressing is...

...comfort. Prioritise anti-crease fabrics and comfortable shoes, because there's nothing worse than having sore feet all day. For daytime, I'd add a ballerina, ideally a satin pair from Miu Miu. If you like high heels or boots, then go for the Maison Martin Margiela Tabi knee-high boots - they're classic.