Wholeheartedly agree that you should read a lot (and write a lot) in order to improve your skills.
I'm 29, and my reading has significantly dwindled compared to when I was a teenager, but if I had to guess . . . 300–350? I'd definitely like to crank that number up.
I'll tend to use name generators and then play around with inserting or removing letters, moving them around. Have them read aloud to see if they hit the ear right.
Oak King Holly King by Sebastian Nothwell
Heads Will Roll by Josh Winning
This Cursed House by Del Sandeen.
Two and three are not exactly Christmas reads, but oh well.