Firstly, write down your goals and objectives on a piece of paper or on some post it notes - remember to make them S.M.A.R.T (Specific, Measurable, Achievable, Realistic and Time-bound). Stick these up around your house, apartment etc. You may even wish to write out the affirmations in this audio as well. You don't have to do this, but these drastic approaches can go a long way to conditioning your mind.
Listen during the night as you sleep and/or during more active listening sessions, i.e. while conscious, during meditation/relaxation sessions. At the start of each session, relax your mind and body, then begin to visualise yourself achieving these goals - try to incorporate all senses - visual, auditory, olfactory and kinesthetic. Spend as long as you like doing this exercise then either fall asleep to the audio or continue meditating. Try out various approaches and find what works best for you as everyone is different. Try this out for 30 days and at the same time, take action towards your clearly defined goals.
Note: If listening during the night, ensure that the volume is set to a level that will not disturb you.