This was the first smoker I started out with!
If it's a brand new rig, right outta the box, you'll want to season the smoker before using it to cook food for the first time.
If this is a used rig, then skip this step and get yourself a
chimney starter. Load that sucker up with some hardwood lump charcoal (Royal Oak is best if you can find it at your local wal-mart / hardware store) and pack some newspaper underneath the bottom and light it up and allow the coals to get real hot. When they get hot, pour the coals in the bottom of the charcoal pan.
Get your choice of wood (i.e. hickory, cherry, oak, etc...) and wrap them loosely in some heavy duty aluminum foil. Poke holes throughout the foil and throw that lil' wood packet on the coals.
Fill the water pan 3/4 full and place it in the smoker. The temp gauges on the lids are crapola so if you have a remote therm, or digital therm probe, poke it through a potato and stick it on the grates of the smoker so you can monitor the internal temp of the smoker. Add more coals if you need but don't overload it with coals or else you'll have massive temp spikes! You're looking for a nice, even burn with somewhat consistent temps between 250 and 275 (for rubbery skin). Let the temps fly between 300 - 325 if you want crispy skin, just be sure to check the chicken in both the thickest part of the breast and thigh, ensuring they hit 165 degrees.
That's everything I can think of for now. Throw out those questions if ya got 'em!