Guild Wars skills have a wide range of quantity of skills to use and pick from. However, there is only option of 8 skills to be used in a mission. So only skills can be changed before a mission, so make sure you have what you need and will help your group.

Types of skills
* Hex/Curse – This causes negative effects on the person or creature and usually makes a skill go down for a period of time
* Buffs – These will enhance either a stat or another kind of affect on a person. However most buffs are only self cast and can only be used on the caster
* Attack – These are what causes the physical damage and is used by rangers and warriors.
* Defensive – Each profession has at least one def skill to use. These have the ability to decrease the change of being hit or the amount of damage that the caster takes. The warrior has the most abilities to use for defensive skills.
* Spells – These are the other types of damage. These can either be targeted attacked or used by an area of effect spell. Depending on what you are doing, many of them are situational in both pvp and pve.

Here is an example of Guild Wars Skill GW Skills Information submitted by our community.  (Note this information is not valid and should be considered nerfed)

Info: Chest with keys now will have almost always great items.

1) Buy some keys
2) Go to destinyes gorge in the desert.
3) Go sourth towards a portal sourth of the ascension mountain.
4) Its before the Scarr and skywards reach.
5) You will always find an elonian chest.
6) Rinse and repeaste for easy items.