Don't neglect the training during your Career Mode as it can help you develop your side and if you're short on transfer funds it gives you a cheaper way to raise your team's performance. It's important that you try to develop your youth talent by gently easing them into the first team and if you have trained them regularly they could start to make an impact. If you frequently train your experienced players their market value will grow and then you can make more money in the transfer window. Make sure that you focus on improving the lower-rated skills so that your player becomes above average in all attributes rather than a specialists in one area.