FIFA Dribbling
Dear player, try to master at least two dribble skills. Practice them in the arena until you can do them in all directions. Note that you have to use R / RS in the direction your player is looking for him to make the skill.
After you have mastered two, you should do them not too often throughout the game. Do one and pass. Do the other one and pass. When you get close to the goal, shoot. Try to shoot whenever the way is free. This will give your team an emotional boost and make them play better. Do not try too hard and shoot when you think it will be a goal 100%. Try to shoot whenever you can.
FIFA Shooting
In FIFA 15 the finesse shot is back and better to attempt than the normal shot without pressing any other button than B / CIRCLE.
Do not hold the shoot button too long as well because he will shoot the ball to the stars.
FIFA Tactics
Some tactics you can use is. Fine tune your direction with the L / LS joystick. Minimal direction turning will drastically better your performance in dribbling and passing an attacker. You should have a good balance between passing and keeping the ball.
A nice trick I like to use is hogging the ball as long as you can so your opponent gets agitated. In FIFA 15 it is really easy for noobs to shoot goals in the last minute and even make you lose the game when you have done all the work.
Ultimate Tricks:Keep playing safe and keep passing the ball.
Another thing you need to take care of with runners is that you need to use B / CIRCLE to pull or push the opponents. Most of the time referees do not see that and you can get away with it.