Theres a good thread in Lessons Learned about a fellow POA Pilot that survived a brutal forced landing likely due to carb ice. I had a run in with it in primary training that turned out fine, but lets face it its a risk that is always there, for some of us more than others depending on what we fly. My Cessna 140 with a C-85 is a known "Ice Maker", so I'm very conscious of it, but I think there is more I and we could learn on the topic. What is some wisdom and practices you know of that could prevent what our brother Doug F went through? My POH calls for carb heat from start up to take off. I've read several decades worth of NTSB reports on Cessna 140s and notices multiple engine failures after take off with no known explanation, no fuel starvation, nothing found mechanically wrong with engine. I'm wondering if these could be carb ice problems, that maybe the pilot didn't follow the original POH and run heat before take off. Even testing it in run up for just a second or two could make matters worse if you had a bit of ice, hit it for a second see the drop in rpm and right back off, driving ice even deeper into carb? I will shut carb heat down in summer for taxi for filtration, but I do run it all through the run up and have it as my last item on checklist before take off. I also run it periodically through cruise for a minute or two here and there. I never turn it on for less than a good 30 seconds to a minute or so, as I believe a quick burst could be worse than anything. After reading Doug's story I am going to come up with a system so I hit it on a regular basis throughout flight. I've also been told (By my flight examiner) that at a certain really low temp one shouldn't use it at all as it could put the temp into an area of temps ice is more likely. I've never heard a soul say that besides him. Is there anything to that? What practices do you follow to prevent carb ice? Things to be mindful of about carb ice? Do you fly when temp and dew point close? When they are close do you do anything different? Lets share some collective wisdom on this, it could prevent another story like Doug's possibly with a worse outcome.