I'll chime in unsolicited here as someone that burns, helps burn, but has never been officially trained. We burn a lot in Eastern Kansas.
1) Prescribed burning is one of the best habitat tools there is. Not to mention it's just awesome as hell.
2) There is no substitution for proper planning/preparation. Firebreaks, tools/vehicles at your disposal in the event something goes wrong, Notifying neighbors, recruiting additional assistance, etc. Know the forecasted winds, have a plan in case something changes mid-burn, notify your local fire department, etc. I burn solo a lot in smaller burns, but cannot stress enough how great it is to have help. Lots of eyes, ears, and extra hands.
3) Even with every detail know that something WILL go wrong. And don't panic when it does. If you did #2 correctly you, and anyone helping you, will know exactly how to deal with the shift. I'm not certain there has ever been a fire I've set where at some point during the fire I didn't think, "oh s**t, that is not what was supposed to happen." So be ready for that and know how to react.
4) Not every fire has to be a head fire. In addition to you hard fire breaks, utilize back burns to create an even bigger fire break along your edges. They burn slow, are easier to control and provide good insurance for your head fire(s).
5) Spend at least as much time ensuring your fire is out as you do planning the fire. My completely unscientific guess is that of the fire "problems" we have here locally at least half of them are from flare ups 12 hours to 3 days after the fire. Post-fire is a big problem because if you have a standing dead tree and it catches fire internally it can burn a long time. ...AND it can throw fire out of the hollow top 60-80 feet above the ground. Large on the ground timber burns forever as well. ...as does heavy thatch. It burns right across the top leaving a lot of fuel underneath. With some hot ash and a little wind all that thatch underneath can reignite hours later. An issue I never anticipated but that almost bit me in the ass was the root system of a dead tree stump. I had sawed the tree and removed it. I allowed the stump to burn during a prescribed fire and it burned smooth to the ground. 2 days later I wake up in the morning and see a flicker of fire in the pre-dawn darkness. I scramble out to find that the large dead root system from this tree (which extended 50+ feet beyond the stump) had been burning underground and it reached a point where the root breached the surface. When it did and was exposed to the air it flared up and was burning 12-18" high. Lucky for me it was still inside my fire perimeter. ...but only by about 10 feet. Had that root surfaced 12 feet further out it would have ignited 3 foot tall native grass and WHOOSH, away we go.
There are about a million little points I could make, but it really all leads back to get additional volunteers, have them help you think through the various scenarios, have them on hand to help, and do plenty of work on the back end of the fire.
I have encouraged my neighbors to help me burn, and I in turn help them burn (or help them with something else if they don't burn). That also helps me identify potential fire hazards on neighboring properties that I might not be aware of in the even the fire should move in the wrong direction. ...it also helps me recruit additional equipment, particularly Tractor/ATV sprayers. Pressurized water is priceless in many of these situations, particularly on the very edges of a fire. ...that said, unless you have a fire truck it's doing nothing to stop a 30 foot tall native grass head fire. But 3-4 feet tall? You'd be surprised what even a 4 gallon backpack sprayer will do to sort of "hold the line" until a tractor can arrive.