A focus on process is a 'next job' mentality, being present in the moment and focusing on exactly what needs to be done in that moment. In a fast moving, complex, sporting context there isn't the available cognitive capacity to fully apply yourself to one passage of play whilst also determining the ramifications of the various outcomes of it. Instead the best method is just to give 100% to that moment, executing that play to the best of your ability, when that is complete you do the same with the next moment.
This sounds wonderfully basic and simple but take a moment to reflect on your day, how often were you actually present? How much time did you spend running over past events? How much time did you spend daydreaming about future events? For the vast majority of people time spent in the present is dwarfed by considering past or future actions. This has a serious knock on effect, if we aren't present then we can't be giving tasks our full effort. If we are ambitious types then this is not the path to success.
From a mental health standpoint this lack of presence can be concerning. Dwelling on negative past events (rumination) and fears of future events (worry) are linked with some psychological conditions such as anxiety and depression. In these ruminating and worrying states we dwell on problems and don't see the solutions. Whilst this knowledge, in itself, could prove worrying the good news is that there is plenty we can do.
Developing a present focus is simple, but not easy. It requires practice. Constantly ask yourself what you can do now. What is the task in hand and what will get that task closer to being finished. If faced with a complex task then break it down into manageable pieces. Excellence is not completing tasks with one brush stroke, excellence is a matter of steps. Stay in the moment, finish the task in front of you and finish it well, process is about completion. You will soon find that staying in this process focus actually becomes relaxing, work is challenging but manageable, you lose track of time, absorbed in the task. This is known as flow state. Flow state is your friend!
There are other techniques you can look to help keep you in the moment. Mindfulness based meditation practice is at the top of this list. Headspace is the best place to start if you have an interest in this.
I hope this brief look at process has opened your eyes to the importance of presence in everything we do. It is not a complex theory and it isn't difficult to implement. As ever, practice is everything. So keep telling yourself 'do the right thing, right now'. Don't worry about getting from B to Z or how you got from A to B. All that matters is that you are at B and you need to get to C. Apply the process and finish this task well.