I think alot of interesting points have already been raised on this thread, but maybe I can add a few more ideas.
I think that both young men and women can benefit from practical advice on applying for jobs, career development, bigging up their transferable skills, etc. Even in the current tough economic times, when my organisation has been inundated with applications every time we advertise a job, I've still been disappointed with the quality of many of them. Simple things like spelling mistakes, glaringly bad grammar, not following basic instructions on the form can put you out of the running even when you might have excellent experience, qualifications, skills and enthusiasm. You've got to get the attention of the employer first, and a slap dash application won't get the right kind of attention.
As others have said, the reality is that the job market and the situation when you are in most jobs isn't one involving a level playing field. Indirect, if not direct discrimination (sexual and other forms,) is entrenched, often so much so that it's taken for granted that things will be "different" for men and women, without it even being questioned. Basically, the set up is mostly pretty damned unfair and the problem with building skills without doing so in the context of that uneven playing field is setting up young women not only to fail, but to blame themselves for not being "good enough," when factors holding them back are not within their sphere of control.
So for me, I would suggest putting work in to setting that context. It's only when young women recognise the reality of discrimination that they can develop the skills to discern what is going on, to spot mechanisms of oppression and injustice, not take things at face value, but also be able to work around and within what is there to their best advantage.
Some of that is about "unlearning" many of the things they will have been conditioned to believe about themselves, about the world around them, about the world of work. But, I really think this is important - sort of building their resilience and capacity to engage with what is a patently unfair system out there while hanging onto their sense of self-worth, getting on as best they can and hopefully being part of positive changes for successive generations of women who will follow them.
I would actually suggest that some of the work be done in separate groups for young women and young men. I think young men also need to hear that message of institutionalised discrimination and need to recognise that they will benefit from unearned privilege just for being blokes. But, I think the way the message is conveyed needs to be different for young women and young men to genuinely make an impact on both. In my experience, too often when mixed gender groups are addressing issues involving sex discrimination, particularly when they don't know each other, haven't already built up a trust and rapport of some kind, is that the guys will get defensive and the women will often either feel silenced or feel sorry for the men (that's what they've been conditioned to do after all!) and reject the message. If you put them off at the outset, you probably won't get them back.
Sometimes it works to do a bit of separate work with young men and young women and then bring them together when both have "come along" in their thinking a bit. I don't know if it's possible to do that, but I would be worried that if you are talking about workshops that will involve mostly women but some young men, you could end up with the scenario I described at the end of the last paragraph, which can actually be utterly counterproductive.