Ok, I am going to fess up here and say I have cocked up twice now. And I suggest before people criticize, please know that I am already aware of the problem, and I have addressed it. We all make mistakes. In my opinion, a good pilot will admit to mistakes and learn from that. I am trying to be a good pilot.
1. Was supposed to do a flight to coffs, weather was crap so we headed north to bundaberg instead. I am a student at this point (although I consider myselft a student for life), and whilst not a training flight per se, I have next to me in the right seat a very experienced instructor. I am a well seasoned sailor, so I get weather. Heading back from bundaberg we hit the front that stopped us going south. I did not expect is so soon, neither did the BOM, neither did the pilot sitting next to me. In fact, we were one of a group of about 5 aircraft doing the same trip. On the way home, we have a fuel imbalance so we switch to the tank that has more fuel. Getting close to home we are dodging storms and rain squalls, constantly looking at the radar. Somehow both of us missed the fuel situation, and only realised that one tank was low when the alert sounded (g1000). Now my regular checks include monitoring the fuel guages EVERY SINGLE TIME do my nav checks. Also, as I gain my experience I find I carry not much more than the fuel I require for safety reasons, so now I am constantly checking my fuel gauges and cross checking with my fuel plan/log.
2. Not long after I got my RPL, I did a flight out and about just to enjoy flying without the training part. Coming back to the airport, I was greeted with a lot of aircraft coming into land, and somehow in the panic of trying to track all the other aircraft in the circuit I missed my pre landing checks. At the time, I was on one tank when the POH stipulates both (C172S), I realised after I landed. There was no danger at the time, as I had plenty of fuel, but had I been ending a long flight it could have been a different story. Now, I do an informal pre landing check within about 10nm of landing. Then as usual, on downwind (or about 2-3 mile out when straight in, base join at Class C or D) I do my formal pre-landing checklist.
Lucky for me, my mistakes have not resulted in bad outcomes. I hope that I learn enough from my errors so that I can prevent future problems. I only have about 150 hours total flying experience to date, so no doubt I will make more mistakes. However I am doing everything I can to prevent it, and I probably take more from other pilots fessing up to their errors than anything else. Also, I find by teaching I become better educated. So me owning up teaches me a lesson and the result is always positive.