As mentioned, some standard advice is good (whereas a lot of it is flawed). Some good standard advice includes the need to your CV to be no longer than two pages, and also the following;
Not every client who comes to us has a straightforward career path. Indeed, some clients have a very winding and chequered career path, and this frequently does them no favours when it comes to landing jobs. And especially if, as.
Okay now for something a bit more conventional/typical.
Another recent project was a CV for an account manager who had worked primarily in the telecommunications sector. On this occasion, and in total contrast to the last case study, the client’s original.