First you need to decide if you plan on cooking or smoking. It is two different processes.
I do not like the fire box type, but then I do very little smoking. Smoking is done slow and
with low heat (225/250) as mentioned and you need to keep the moisture in with a pan of
water some where in the process. If you just want to BBQ steaks- use the main compartment
for the fire. You need a thermometer on the wall of the pit. If it does not have one you can
buy one at Lowe's Home depot, hardware store, ect, and drill a hole and install it. For regular
BBQ as in ribs and brisket, keep the temp around 300. For ribs, cook with the bone side down
until they are almost done then flip them and finish them. You do not want them over the fire,
but off to the side a little bit. Brisket, I sear the outside and smoke it with chunks of what ever
flavor you want. Then move it off to the side. This takes around an hour. Then baste and slow cook
for another hour or so and then rap in foil but leave the top open so you can baste it with its
own juice. There are a million varied ways, these are just some of the things I do, the basics.
Brisket--the longer and slower you cook it the more tender it comes out-- the quality of what
you start out with has a lot to do with it as well.