It’s important to use a structured technique and to practice this technique until a level of proficiency is reached so that each and every parallel park is accomplished successfully.
It doesn’t have to be completed in one complete maneuver however as many think. It is acceptable to move forward and make adjustments during the maneuver, providing this is done safely with constant all-round observation.
A structured technique is applied by use of reference points. There are several techniques that can be used for the parallel park, which ever technique used, using reference points aids learner drivers accomplish this maneuver. Cheers