One could say I've mastered basic math. My wife (former loan manager for a credit union) and like to do some math in our heads as we are living life.
Grammar. I’ve been working on grammar for quite some time. Having self-published a few short stories does not correlate to good grammar, but I hope I do a good job.
I wanted to learn Russian. Haven’t started yet.
I haven’t struggled with accountability for a few years. My biggest flaw in responsibility is having an Amazon card, though.
I pride myself on taking good pictures with my phone. My pictures, with 3 cameras, come out better than most people with $1,000 phones.