Initial dissection and definitions

To begin looking into my given question closer I carried a few basic Google searches to pick at and dissect some of the key words - Theory, Inform and Practice.

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Theory (noun)

1 A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
‘Darwin's theory of evolution’ 

   1.1 A set of principles on which the practice of an activity is based.
   ‘a theory of education’ 

   1.2 An idea used to account for a situation or justify a course of action.
   ‘my theory would be that the place has been seriously mismanaged’ 

   1.3 A collection of propositions to illustrate the principles of a subject.

Key synonyms: hypothesis, thesis, conjecture, supposition, speculation, proposition, premise, surmise, assumption, presumption, presupposition, notion, guess, hunch, feeling, suspicion, principles, ideas, concepts, doctrine, teaching, principle, ethic, ideology, idea, ideal, position, opinion, point of view, belief, judgement, reckoning, thinking, thought, notion, conviction, persuasion, attitude, feeling, sentiment, impression, concept, conception, estimation, conclusion, verdict.
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Inform (verb)

1 Give (someone) facts or information; tell.
‘he wrote to her, informing her of the situation’ 

2 Give an essential or formative principle or quality to.
‘religion informs every aspect of their lives’ 

Key synonyms: tell, let someone know, notify, apprise, advise, announce to, impart to, communicate to, suffuse, pervade, permeate, infuse, imbue, saturate.
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Practice (noun)

1 The actual application or use of an idea, belief, or method, as opposed to theories relating to it.
‘the principles and practice of teaching’ 
‘the recommendations proved too expensive to put into practice’ 

   1.1 The carrying out or exercise of a profession, especially that of a doctor or lawyer.
   ‘he abandoned medical practice for the Church’ 

2 The customary, habitual, or expected procedure or way of doing of something.
‘product placement is common practice in American movies’ 

3 Repeated exercise in or performance of an activity or skill so as to acquire or maintain proficiency in it.
‘it must have taken a lot of practice to become so fluent’ 

   3.1 A period of time spent practising an activity or skill.
   ‘daily choir practices’

Key synonyms: application, exercise, use, operation, implementation, execution, enactment, action, doing, use, apply, employ, put into effect, custom, procedure, policy, convention, tradition, fashion, habit, method, system, routine, institution, way, rule, training, rehearsal, repetition, preparation, study.
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Just this simple, quick exercise has already helped me to look at the question in a different way. Rather than thinking about the theory of practice, in the sense of putting an idea into practice, I’m now moving more towards defining practice as the repetition of an exercise.

Maybe I need to be thinking about the idea of performing an activity over and over, and how by doing that can we inform our working practices?

We usually consider ‘working practices’ as the way that our work or job is predominantly carried out. How we go about our profession to complete the job at hand. So maybe the question is, can repeating an activity inform or improve how we carry out our work?