[NoRider]

So, do you? I have for the past 20 years, but am always looking out for hints.

I mostly use a metal file to get a good edge on the blade, after taking it off the mower of course. Sometimes I have to use an angle grinder first, if the blade has hit something hard.

Keeping the blade sharp makes a real difference in how the grass looks when you're done.

 

[NoRider]

Always sharpened my own because I'm too danged cheap. Besides, by the time you drive to somewhere that can do it, wait for them to get off their butts to find a kid to do it, actually get it done and drive back home again, you could do it yourself and have the lawn finished.

There's no big mystery to it. Take the blade out and mount it in a vise. Use a good sized (maybe 1" wide) fine metal file and draw it along the length of the edge. Keep going until you have a decent edge... you're not doing surgery here.

Flip the blade and repeat until you have all edges in good shape. Then, get back to work, already.