Sorry to dig up a bit of an old post I know, but I just wanted to clarify something:
While most of the opening post is correct, I will have to disagree about the point that states "Don't apply for a job as soon as it goes live" - I'm going to have to say do the opposite. I was a team leader for several years, and involved in a lot of recruitment (high churn role / team) and have worked closely with managers before and after that.
In most cases, a position had become available because someone was leaving the team, and had given us their 4 weeks notice. As most people who have a job, have this leave period, anyone we hire will be on the same notice period, so basically the sooner we hire someone, the less time we are 1 person down (or 2 or 3 - dependant on the situation) so this could have a huge impact on the team. So in most cases, yes we DO want people to apply as soon as possible! The earlier you apply, the earlier you can be interviewed, the earlier you can give your current employer your 4 weeks notice* (if applicable) and the least amount of time we're short of staff, which could afford customers and even the business making money, so I must disagree with this I'm afraid.