How do you make your payments?

[nerp]

Do you write a check for the exact amount?
Do you pay online?
By phone?

Me? I pay online and throw $20 here, $50 there, $100 there, $40 there, etc. I am overpaying the monthly payment amount in the hopes of paying off my Yaris 2 or 3 years early. I find that throwing a little cash towards it every few days ends up being easier than making the lump payment every month and I end up paying much more.