Step 1: REMOVE the Reflexive Ending: -se
arreglar
Step 2: REMOVE the Infinitive Ending:
arregl
Step 3: ADD 1st person Ending:
arreglo
Step 4: ADD the appropriate reflexive pronoun at the beginning:
me arreglo
Step 5: SENTENCE:
Me arreglo para salir. (I get ready to go out.)