I don't organize or categorize my values or think of them as solid and "thing" like, if that makes sense. I have a keen sense of right and wrong "in situ". I need a specific incident or a general type of problem really to make the call wether something is right or wrong. I do have certain constant beliefs and views about society, politics and policies which haven't really changed in time. I'm very liberal (not economically though) and believe in people's rights to live as they wish as long as it doesn't hurt anyone else. I get very peeved when I perceive something I feel is unjust, or ambiguous situations not being fully examined before they are judged and hidden structural violence etc.
As for causes and values...for example...because it's been something I've debated recently I could easily say I'm a feminist, though I think I'm just a person whose been around and experienced weird attitudes and odd beliefs imposed on myself and female friends and colleagues. I see it and get peeved off and say something about it because it irks me and seems crazy to me. That would make me a feminist I suppose, though I've never read a single book on feminism or attended any kind of a feminist group in my life. Just been around. I do also tend to say unpopular things I know will not necessarily win me friends but if I believe they need to be said I will.
I try to make personal choices which align with my beliefs, like buy local produce when I can, live true to myself and not be cowardly, try to help people out if I can and in a way that will go unnoticed if possible.
I have a high standard for myself and constantly strive to act in a better, more positive, nurturing way. Emphasis on strive.

Generally speaking I don't think a person needs defined values to act justly and fairly. I think one has to try to be as honest with themselves about themselves and always strive for fairness and honesty. Even if it's unpleasant to look at your own self and how you've misbehaved it's the only decent way to be, I think. If you can marry that kind of fairness and honesty with empathy and caring I think you'll naturally do what's right at any given time.
EDIT: So I guess values= honesty, fairness, compassion, diligence, forgiveness ...I made a list. ;D