Using recycled materials and basic tools.
I've also made these without handles as a heavy duty lampshade, and from smaller cans too, you can adapt this to your own needs.

Step 1: Materials...

A Large tin can. (This is a catering size fruit tin).
A length of 5 amp twin core electrical cable.
A Lamp holder.
A standard 3 pin mains plug. (3 amp fused). Dependant on you home country
A 6" piece of wood. (brush handle or in this case old curtain pole).
A couple of woodscrews.

Step 2: Tools...

Drill.
Screwdriver.
Drill bits, Step drill/Hole saw if you have either.
File.
Nail or centre punch.
Marker pen.
Ruler/Dividers/compass.

Step 3: Warning!

1 - If you have never wired a lamp/plug then you should seek advice from
someone experienced.
2 - When cutting and working tin it is safer to wear gloves and eye protection.

Step 4: Mark the Centre

Take your tin can and find the centre of the bottom, It doesn't have to be exact,
you can just use a ruler to measure or using dividers work from four opposite sides
until you find the point where all lines cross.
Mark it using a centre punch or a nail, this makes it easier to drill.

Step 5: Drill

Drill a hole slightly bigger than the threaded body of the lamp holder - most are 30mm.
You can drill a ring of holes around the inside of a 30mm circle then cut it with
tin snips or strong scissors, or a hole saw or step drill if you have one, then tidy the
edges with a file.

Step 6: Make the Handle

Cut a pice of suitable wood as a handle - it doesn't have to be round - about 150mm is
good, if it is round cut a flat 30 - 40mm long in one end - I used a rotary tool to also
cut a curved groove for the edge of the can to sit in so it is a more secure fit.
Mark the position of the handle on the bottom of the can, and drill two 3mm holes to
take screws, and screw the handle in place.

Step 7: Ventilation

I also drilled some 8mm holes in the bottom around the lamp holder to help dissipate heat if using a tungsten bulb - maybe not needed for an energy saving bulb, but it may help, and it won't do any harm.

Step 8: Finally...

Fit the lamp holder to the can and maybe use a cable tie to hold the cable to the handle.
I won't include how to wire the lamp holder and plug, as if you don't know already then
I'm not qualified to instruct you and you should seek advice from someone who is!