...I pick up at least one piece of litter, and place it in a litter-bin. That's the commitment. At least one. Every day.
I know...I know...one piece of litter is nothing, it's unimportant, it's trivial. But this is an action that at least minimally fulfils the "one good deed every day" commitment into which I entered as a Girl Guide many decades ago: I have several years of non-compliance so catching up will take a long while.
Picking up one piece obviously sometimes leads to gathering up a good deal more and leaving a railway station/bus-stop/walkway/corner of a park at least temporarily improved. It not infrequently involves a conversation with others who offer encouragement and/or join in to help. It is sometimes horrid (I carry tissue-wipes, and also a plastic bag into which to put the litter until it can be placed in a bin). It probably makes me look daft, but that's too bad.
One piece of litter. Every day.