I permanently kept a few useful things in the cupboard under my desk (You know, that bit of legacy kit from the days of paper files)
A paid of "work shoes" as I only wore them in the office they didn't need rotation, much care or cleaning.
An emergency pair of pants and a polo shirt, for those times I forgot to pack one in the pannier.
Like driving, some days are going to be bad, sorry in advance, but unlike driving some days are good, when the weather just matches the clothes, or you end up with a tail wind and some light snow in the headlight that are they are just magical.