Question

what is a simple easy way to do electron configurations on the periodic table?

Answer 1

You could try and memorize them. That's always the "easy" route. But you should also learn to do this.
s-orbitals can hold maximum of 2 e\(^-\)
p-orbitals can hold a maxmimum of 6 e\(^-\) in it's valence shell.
d-orbitals can hold a maximum of 10 e\(^-\)

I don't think you're required to know f-orbital. Not many chemists focus on many elements that have higher than d-orbitals as it gets confusing.