Im still a relative newb but after a few months of my smoker going out on me, i finally found something that works for me. Try this
Make sure your use the aerator plate inside the smoker. This lifts the fuel off the smoker floor so that air can get to the smouldering fuel.
secound, i find corrugated cardboard the best fuel. get old cardboard boxes, and disassemble them. cut into long strips. The width of the strips is determind by the hieght of the smoker minus the lid and the aerator plate
theses strips are then rolled up, using other strips if needed, until they are they same circumferance (sp?) as the smoker. This will give you the smoker cartridges that you see for sale on 3bay or th*r*es
using a blow lamp or catering tourch, light the bottom of the smoker cartridge until all the bottom off the cartridge is glowing red.
put this into your smoker, with the lid still off, pump the bellow hard until flames are seen comming out of the top of the smoker, Replace the lid and get to work.
These cartridges smoke for ages but if your a bit slow between inspections, lie the smoker down, this slows down the burning of the fuel inside the smoker but dont leave it too long otherwise it will go out.
also, be sure to remove any debris from the smoker before every use. A blocked smoker does not work too well