Neil, I'll add to this. Instead of the magnifying glass in the header, I have the word "SEARCH" spelled out. Makes it more noticeable, IMO. Here is the code:
/* turn icon into "SEARCH" in top header*/
.h-search i.fa {
font: inherit;
-webkit-font-smoothing: inherit;
-moz-osx-font-smoothing: inherit;
}
.h-search i.fa-fw {
width: auto;
}
.h-search i.fa-search:before {
content: "Search";
}