Chaos Knights

These are exspensive (66 pts. or 80 if you give them Chaos Armour) troops, but are very hard hitting and mobile, they have very good stats with high WS, BS, S and T, and 2 Attacks, and high Ld. These are the troops you use for breaking the enemy's line and / or his troops such as Bret Knights, etc. You should always give your Chaos Knights a standard and musician, and a magic standard if possible.

Chaos Warriors

Chaos Warriors are foot versions of the Chaos Knights, they are good troops for anchoring an important section of your line and for attacking heavily armoured foes. You should also give Chaos Warriors a standard and musician, and a magic standard if possible.

Beastmen

These should be the backbone of your Chaos Army, as they have good WS, T, and 2 Wounds. I would place a champion with as many units of Beastmen as possible, always include a standard bearer and musician, and I would give as many as possible magic standards.

Chaos Chariots

Chaos Warrior crewed Chariots are very exspensive, but given scythed wheels, they are devastating. Use these to attack flanks and tactically important locations in the enemy line. Just remember Chariots need open terrain to maneuvre.

Beastmen crewed Chariots are less exspensive than those crewed with Chaos Warriors, but are still very effective if used in multiples.

Chaos Chariots do not have to be in units of five. They may be used as singles. One chariot may carry a magic standard.

Chaos Hounds

Chaos Hounds should always be led by a Chaos Champion or Hero They have above average stats with 2 Wounds, but with low Ld.

Minotaurs

Minotaurs are exspensive pointswise, but in my opinion, worth it. They have a M of 6, WS of 4, S and T of 4, 3 Wounds, and 2 Attacks, with a Ld 9. With their low I, I usually give them two-handed weapons, as they will usually strike last anyway, unless they are charging. This is another very hard hitting unit, and Minotaurs have good mobility. Minotaurs may have a magic standard, they may have a standard specific to one of the Chaos Gods. This is another good flank unit.

Harpies

Harpies are useful for harassing your opponent's rear areas and artillery. They can fly, so they have good mobility, and can strike most areas of the battlefield.

Dragon Ogres

Dragon Ogres, even at 87 points per model, are useful troops. Five Dragon Ogres with a magic standard can wreak havoc upon much larger units, and they have the benefit of causing fear.

Chaos Centaurs

Chaos Centaurs are good mobile troops, you may arm them in a multitude of ways, they have a choice of halberds, two-handed weapons, a second hand weapon, shield, lance, light armour, and / or bows. Light cavalry armed with a halberd, think of what damage these could do. They are versatile in their tactical role, but you should always give them a standard and where possible, a character leader.

Trolls

Trolls must always be led by a character model to be of use, as they are subject to stupidity.

Chaos Daemons

You may have up to 50% of your points value in Chaos Daemons. This is a choice that you should put careful thought into, you should decide first whether you actually should purchase Daemons to fight the opponent you will be going up against. Daemons are more useful against certain armies, and less useful against others. You must also decide if Daemons fit your fighting style. You must have at least one champion of a Chaos God to choose any Daemons of that God.

Bloodthirsters

Exspensive, mobile killing machines with Chaos Armour of Khorne, the Axe of Khorne, and they can fly.

Flesh Hounds

Flesh Hounds are some of the more useful Daemons, they are fast, high WS, S, I, and Ld, with 2 W, they cause fear, and they wear the Collar of Khorne, which protects them from magic.

Bloodletters

Bloodletters have high stats, they cause fear, and they carry the fearsome Hellblade. They make good assault troops, and they may be mounted on Juggernauts.

Great Unclean Ones

An exspensive, huge killing machine with Chaos magic spells from the Nurgle deck.

Plaguebearers

They carry the Plague Sword, and may ride Beasts of Nurgle, they cause fear and they have a magic level equal to one for every five models in the unit, up to level four. Their cards are drawn from the Nurgle deck. These also make good assault troops with magic ability added in.

Beasts of Nurgle

These Daemons, with their special rules, can be quite nasty on the battlefield.

Nurglings

These are some of my favourite Daemons, these nasty little bugers can wreak havoc on your opponent.

Lords of Change

A Daemonic, level four flying sorcerer that causes terror, and uses spells chosen from the Tzeentch deck.

Pink Horrors

I like the look on my opponent's face when he kills five Pink Horrors just to be faced with ten Blue Horrors in their place. Blue Horrors fight along with any remaining Pink Horrors in the unit. A Pink Horror unit has a magic level of one for every five Pink Horrors, up to level four. Blue Horrors do not count toward this magic level.

Flamers of Tzeentch

Bounding, mobile flamethrowers, with a firey hug. These are some of the most mobile troops in a Chaos army, as they are not slowed by obstacles.

Keepers of Secrets

Keepers of Secrets have an entrancing aura, which can put opponents in base to base contact into a trance-like state in which they cannot fight unless they pass a Ld test. The Keeper of Secrets has a magic level of 4, with its spells chosen from the Slaanesh deck.

Daemonettes

Daemonettes have high stats, cause fear, have a magic level of one per five models, up to a level of four, and may be mounted on Steeds of Slaanesh (with a special tongue attack) to make very fast moving hard hitting troops that also have magic and special abilities to aid them.

Fiends of Slaanesh

Fiends have three attacks, including a special poisonous attack with their scorpin-like tail. The Daemon exudes a soporific musk, making enemies in base to base suffer a -1 to hit penalty.