Sometimes there are abnormal situations that actually call for this, like voretaq7 mentions in his answer, the Cherokee POH references it as a short field landing technique.

That being said, follow the guidance in your POH. Once you exit the runway and come to a complete stop, you can devote the proper attention to the after landing checklist so will be more likely to complete it correctly without missing any items that may become an issue on your next flight.

There is also the possibility that in a retractable gear airplane you could accidently retract the gear if you are moving things while still preoccupied with landing. You should focus 100% of your attention to controlling the airplane (don't stop flying the airplane until you come to a complete stop) and watching for other traffic (or someone crossing the runway in front of you) that might be a hazard. You should wait until clearing the runway before performing any non-essential checklist items because you are still in a critical phase of flight and at a relatively high risk while still on the runway. (I noticed that most airliners also wait until they're clear of the runway, but these jets have spoilers to get rid of all the lift) My question is: Is it really a bad idea to raise the flaps that soon after landing? Or is it actually a good habit? He couldn't provide a good reason though, so when I told him about the things I listed above he simple mumbled something about keeping my attention on the runway instead of fiddling with the flaps lever (which is a something I don't even have to think about) However, I was recently checked out on a C182 that I wanted to rent in Florida and when I raised the flaps right after touchdown the instructor shouted ' what the are you doing? You should never raise the flaps until you've turned off the runway'. (less important) it's part of the after landing checklist, so when it's done, it's done.less crosswind effect, reducing the risk of loss of directional control after landing.

better braking performance because lift is reduced while rolling out.It makes sense to do this for the following reasons: My instructor used to do that every time during initial training so I took over the habit. I have made it a habit to raise the flaps right after touchdown (when the nosewheel is on the ground). This question is about light, tricycle, single engine aircraft.

Aicraft bounce on touch down