I think there are sub-subjects in your question.
First, like everyone else, I try to include my practice in my 'mundane' life, or more accurately try to blend them so that it's impossible to distinguish one from the other. For example: eating could be mundane but taking 3seconds to do a mini ritual of thankfulness or even a healing visualization before eating makes it magical. Same for cleaning the floor or anything else you do during your day.
Second point is the physicality of things/ tools/ movements that can or can not be accepted in certain situations. As a professional closeted witch I have come up with several strategies to disguise tools as other tools, replace them, or simply use my mind's eye only when necessary. The key here is training and creativity + some testing.
You can do a lot with next to nothing, actually you can do anything, it's just a question of preference (and a little bit of training let's be honest).
I would recommend an e-book reader (with password), paper and pen, and a spoon or an otherwise acceptable metallic tool for scraping/ banishing/ cutting through as starters. Lighters and candles are usually viewed as quite neutral but again I don't know which context you are in.
So to come back to your question you can also use mundane objects for your magic where the goals are to impact your 'mundane' life. One day you may wake up, or more likely realize during a meditation that nothing is mundane anymore in your life. You're a magus Qwzxas.