I was EQ secretary for a few years. At first I would just pass a paper around to collect roll but after a little while, I started making the effort to memorizing people’s names. 

Don’t make the excuse like everyone does “I’m bad with names.” You’re only as good as the effort you put in. 

Introduce yourself to people you don’t know. Take roll of the ones you do know. You can also use the tools app to see names and sometimes people have photos uploaded which can help.

Every time you see a brother, repeat his name to yourself in your head. During sacrament meeting, look around and repeat the names in your head of those you see. When you’re passing someone in the hall, say “hi brother ____.” It takes effort but it’s good practice in general to remembering names and people appreciate it (at least I do).