The other key is to move fast. If you want one of these people, don't waste their time with phone interviews and things like that, just get them scheduled to come in as soon as possible.
At my last two companies we would bring people in for an afternoon of interviews and have an offer ready for them at the end of the day if things worked out. That's the kind of process you need to have to snag people like this.
As a simple case study, the last time I decided to get a job I had 3 offers within two weeks. All through my network.
Currently, I left my last startup in the middle of last week. I haven't started actively looking for something else to do yet, and I've already had one offer through my network.