I'm such a fan of stretch pencil skirts for quick and easy outfits that still have a bit of sass. This one was from Primark a while back.
It doesn't take any more effort to dress up a little. You can put on any two items to cover your body, from baggy and miserable trousers, to bright and kick arse disco pants. How we dress, and how we present ourselves to the world impacts how we feel, and how others interact with us.