I try my best to not do anything different. If I miss it, it's just a miss. Like I'm going to miss some putts, percentage-wise it was probably one of those that just did not get in. So I feel like what works the best is just to keep my head up, and try again, with the same routine as before, and not do anything differently, just keep aiming at the basket and go.
However, sometimes if it's in tournaments and the putt is very nervous and different which can sometimes happen for me, and I really lose the feel of my stroke, I try sometimes just give it a good bid and be firmer and in an attacking mentality if I noticed that I'm being scared of missing, then I might just be like "okay, I might miss this one, but lets at least give it a good go" There was also one tournament I just switched to straddle putting after missing a lot of right and it helped...
Overall I think what works the best for me is to just keep my routine and even if I miss a few, still keep putting like I'm confident. My first part of my routine is to raise my chin and stay tall and upright in a confident posture, Doing this really helps avoiding missing low and getting a good, confident stroke for me, and I imagine a lot of people unconsciously slouch more in their posture when they're not putting confidently and/or missing putts. I really like this part of my routine, beacuse even if I'm not very confidence, the posture of confidence helps both technically and mentally.