If you have a lot of contacts in you smartphone searching can be a pain because it gives to many hits. My solution is to put the contacts' initials at the end of the name as a pseudo-hash to speed the search so that normally it only three taps.
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Step 1: Here's the Problem
All those named with Z... How to get to who I want easily?
Step 2: After the Initials Have Been Added
With the initials added, as per the image.
Step 3: What the Search Now Looks Like
Now with two initials I quickly get to who I want or reduce the number of hits.
It really comes into its own when sending SMSs to a group of people.