Struggler,I agree with Gold that it one of the things you should be thinking about is what other career you might do. The other thing you should be thinking about though is "what would it take for you to stay and be happy". If you come to the realisation that you might want to leave and in fact can leave, then it might pay to take a few more risks at work in order to make yourself feel comfortable.This could for instance involve pushing back more firmly on the hours people are asking you to work (I did this when I came to the realisation that it was just a job and there were others out there I could equally well be doing if this one didn't make me happy).In your case however it feels like you are least comfortable with being seen as a "fraud" particularly by your clients. I think there are three things you can do to help with this and if you are genuinely feeling like you want to leave, you should do them, even if you think it might risk p*ssing people off:1) Work out how you (personally and as a company) might actually be helpful to your clients (both individuals and as a whole organisation). When you have this straight in your mind you should feel more comfortable with focusing (both psychologically and in practice) on those aspects of the work and not on the areas where you feel uncomfortable (like telling experienced people how to do their job when you think you don't know anything about the subject). The answers to this question will vary from study-to-study, and I'm sure there are people on here who can help you with possible answers that aren't simply "knowing more about the industry than my client".2). When you can't see a way in which you or your firm are adding value, say so to your managers or partners or whoever. Not in an accusatory manner, but to see what they think and to make sure they are thinking about it. This might be seen as being difficult, but if you are respected in the firm, it might be seen as asking the really helpful and important questions - "why are we doing this work?" and "how can we actually make it successful?"3). Once you've got the above two questions straight, you then need to work out how to deal with the clients. If you feel unprepared, there are a few things you can do: (a) nail the details on the areas that you have been working on so that you are 100% confident (you say you are good at the "bigger picture" but at a more junior-level, being bullet-proof on the basics is key). (b) be prepared to say "I don't know" when appropriate- if you are happy with the quality of your work and have established your own credibility then the best thing to do is to be confident in admitting ignorance - while offering a way forward (e.g. "this isn't something I've worked on yet, so I can't give you a firm answer, but my initial thoughts might be..."). If at the end of the day your client is being a jerk and making unrealistic demands, then this again is a conversation to have with your management - a conversation that is perhaps harder in the current economic climate, but is perhaps easier if you know that you will leave if you cannot make the lifestyle sustainable for yourself.So - I don't think I'd give up yet - as R2D2 says, "Chin up". But you should work out what else you might be doing (e.g. talking to other firms or individuals) to make you realise that your firm needs you as much as you need them whilst at the same time taking a more active rather than passive role in shaping your work and lifestyle.Hope that helps.