I'll share my experience on how I get jobs. I never won any job answering job offers. All the jobs I got (6 or 7, doesn't matter) I got knocking doors. Literally. I never "lost" any interview that I got this way.

Is this a rule to follow or was just luck? I don't know the answer. I know that it works for me. Ok, I'm in the architectural field, within other industries and corporations probably would be impossible to have this approach. Age is also an important factor. Knocking doors when you're during your 20's is not the same as during your 40's. Even during your 30's is already more difficult.

It's my experience. I hope it can help somebody.

edit: This way people who could make the interview already know you. You are already interviewing without any appointment! If they ask you a more formal interview you're in. Early mornings always choose early mornings. Afternoons are terrible for this approach. Everybody just wants to go home. Nobody will have any patience to listen to you.

Smile in the face and confidence of course. This can make the difference. Of course lucks has a big role also: if the decision-makers are in the office or not, if tehy are free, if there is any (even a slight is enough) need of people, etc