You might start by ensuring you have some appreciation of what airline crewing is about. To that end, start with reading your flight time limitations section 7 of your ops manual or CAP371 ( you can find it on the CAA publications website if you don't have an ops manual at home). Also, talk with the other crewing people if you can.
İt is first and foremost about ensuring that operational control is exercised and crews are kept within the limitations of your company's FTL scheme, not CAP371 as many believe- although it has to be said, that many schemes are very close to CAP371. How your company does all of the above is the on the job side of your training. But, as other crewing people will attest İ am sure, it is also about your ability to deal with people, sometimes in difficult and stressful situations, keeping a sense of perspective and of course, sticking to the rules- that keeps us safe.