From what I recall snakebite is treated pretty much the same way all the time.
Rest, Relax and Reassure. In other words get the casualty to sit down, get them talking and try to calm them down and let them know they will be alright.
Whilst this is going on you can be doing the physical side of life, immobilize the bite by splinting ensuring that once splinted if the injury swells the splint does not become a tourniquet. I believe that elevation of the injury can also be done.
The casualty must be dissuaded from using the injured limb which is one of the reasons for splinting.
After that you are looking at evacuate to the nearest medical facility which has the potential to administer anti-venom.
When looked at you could say that the treatment is similar to that used for shock, but as Martyn has mentioned different snakes have different venoms.
IIRC Venoms are generally broken down into four major groups, Heamotoxin working on and in the blood stream, Cytotoxin that is destructive to tissue, Neurotoxin which effects the nervous system and Cardiotoxin that acts directly on the heart.
Most snake bites don't just fall into one of these categories they actually fall into all of them as the venoms are constructed from a series of complex proteins which exhibit certain characteristics. The venom of the Puff adder for instance is classed as a cytotoxin as the majority of the complex proteins that are contained within the venom will cause local tissue damage, it does also have other protein strands that cause other damage, but to a lesser degree.
That is pretty much the same for any snake, cobra venom is normally looked upon as being a Neurotoxin, however the site of the bite can exhibit characteristics of other types of toxin like local damage associated with cytotoxins and bleeding associated with heamotoxin.
Identification of the snake is an important factor, but more important is not getting bitten yourself, snakes like the Cape Cobra can appear to be aggressive as they will continuously strike until it believes that the threat to itself is no longer apparent. One bite from a Cape Cobra can carry enough venom to kill 6 people and you maybe the recipient of a few.