What do you obligation to construct a home made bbq hot smoker?

HELP me beside this please?
Answers:    The best thing would be a hulking old biscuit tin beside a lid..but some chippings or tea leaves on the bottom of the tin, put some foil over the chippings with some holes punched through it for the smoke to win out.pierce some similar holes in the tin lid...try and put some sort of rack over the foil to rest the food on...and in that you are.
I ripped the mat out and enjoy concrete...
How to make a smoker from a trash can:
http://cruftbox.com/cruft/docs/elecsmoke...
Pictures of several:
http://www.eaglequest.com/~bbq/smokehous...
One from food make friends
http://www.recipelink.com/mf/13/2201