Well, depending om what you want to do with your character, there are some secondaries that is more preffarable. As I donb't play warrior myself, I can't give too much information.
Anyways, Rangers can be good for different skills such as: troll ungent, antidote signet and poision tip signet giving a stable ground for a warrior.
Monks was commonly used before, for the thing called wammo, but they are a bit disrespected due to the fact that they where used in PvP with bad results, anyways, they are pretty stable in PvE and just therefore was they used.
Elementalist is used for conjures and sometimes mark of rodgort.
If you buy factions the assassins might be of use, with the utility in shatow arts.
If you buy Night fall, the paragon might be of use, a spear + shield set combined with spear attacks, shout and chants.
Hope it helps a bit, but try different profession, se what you like and remember that there is more skills in game than you find in pre. Use the wiki, there is a lot of knowledge in there,
http://wiki.guildwars.com/wiki/Warrior
Remember that you can always change secondary profession later in game, if you find out that it wasn't as good as you'd thought.