1) I just asked her parents if I could go over for a quick chat one night after work (so they probably twigged on from that), just got straight to to the point and said I was planning to pop the question and knew that the Mrs would want me to ask you first. They were very supportive about it and just asked if I had a plan for doing it etc.
2) The ring was the hardest part for me as she gave me absolutely zero indication of what she liked in the months leading up to it. We had both spoken about getting married and it was pretty much agreed we would be doing it at some point (plenty of hints dropped form her and her friends). I tried to get her sister in on the act to give me some ideas, but she wouldn't even go looking at them on their usual shopping trips. I eventually just flat out asked her to help me choose a ring for her, tbh we're both happy we did it that way as she found exactly what she wanted and it saved having to run around getting it resized etc. It ended up being less than a months salary, but be wary as they can get pretty extortionate very quickly.
3) I planned a nice getaway to the lakes in one of those spa hotels with the intention of doing it during a scenic walk or a nice dinner, but then though sod it and caught her off guard a night or two before we went. She'd been at a friend's house so I got a load of candles, lit a path of them leading down the hallway and then spread them out in the living room to make it nice. I was waiting for her when she came in and popped the question there and then. Was miles better as I was comfortable, had time to plan what I was going to do/say, it caught her by surprise and we both didn't brick the whole weekend away anticipating the question.
Now we just need to get the wedding sorted, but she's just as hard work trying to get ideas for that too