Fire management baskets were made popular in the US by Kosmo Q, the competition BBQ cook. This basket will extend your wood refill times upto an hour!!

The problem with offset smoker fire management, is you need to make sure you keep a strong coal bed, so when you put your next log on, it takes quickly, minimising the time you have dirty smoke running through the cook chamber while it's igniting.

The 'V' shape of the Massive Discount Fire Management Basket With A 40% Price Cut [iTWjqOle] allows the wood embers to fall into a small well-vented area. Additionally, bonus is the radiant heat this basket gives off. This will also help your wood burn cleanly and efficiently.
It's shape works perfectly with a pinwheel style damper intake. It draws clean air into the fire, then funnels through the basket and into the cook chamber, creating minimum air disturbance, making for a more efficient fire and burn.

Run charcoal and wood, or just charcoal.