What I've learnt from my four recruitment bosses:

1. Boss No 1) I was a pretty raw graduate new to recruitment. My first boss taught me the value of getting to know your sector. Knowldge and credability are key if you're to successfully broker relationships between clients and candidates. Particularly if you look about 12 years old.
2. Boss No 2) Make sure you know your stats. Keeping an eye on your dashboard activity levels is essential; new candidates, job orders, client meetings, call levels etc. Don't slip into being a busy fool by focussing on the wrong areas at the wrong time.
3. Boss No 3) Taught me to be brave in asking for retained work. If you don't ask you don't get but you need to believe you can deliver on what you're promising.
4. Boss No 4) Learn how to adapt. You know how to do the process, you've been recruiting long enough, now see if you learn how other sectors and other types of industries operate and what styles they respond to.

Cheers Bosses ... not always perfect but the neither was I (still not) but learnt something off all of them