I write a few checks a month still - my space rent & utility bill (all-in-one) & my friend that does my hair. I try to have cash for my co-pay when I go to the Dr., but had to write a check for that yesterday. But, since I know how much my co-pay is, I wrote the check while I was waiting for them to open the window (love having the 1st appt of the day!).
Other than that, I use online bill-pay thru' my bank, debit card at the grocery store.