OK, so this article is how to mow my 🌾︎ grass lawn, but has many ideas applicable to you and your lawn.  Specifically, this article reminds me of important details, particularly at the beginning or end of the season, or whenever tired, hungry and grumpy!

Prepare, mow, finish up.
Other considerations.   [Eric:  When you change this document, please 📄︎ print relevant parts, and post on mower!]

Prepare

Prepare to mow whenever your lawn is:

Maybe every 10 days, depending on the season and weather:

If allergies ever interfere with an awesome night's sleep.

I mow my 🌾︎ lawn with a Honda lawnmower, model=HRR2169VKA EJ, serial=MZCG-9229225, manual (.pdf).   I love this mower!  Light, fast, reliable, and it mulches very well!

Finish up

References

[1]  My notes indicate I heard Rick Darke say this at a conference 2015-03-07.  —EP 2016-10-01.

[2]  My notes indicate I heard a speaker say this at the same conference as above 2015-03-07.  —EP 2016-10-01.

Respirator

If, after:

allergies ever interfere with an awesome night's sleep,
get (and use!) a cartoon of person wearing a filter mask … I hate when people wear these in public.  Like OK, we get it, you are a surgeon. … select to view full-size 😷 P100/​N99/​similar HEPA respirator/​filter mask that removes from the air 99.97% or 99% of particulates down to 0.3 µm (1/50,000 in) (about the size of a virus).
Among your options: In my town, Lowe's and Menards have a better selection of PPE and lighting v. Home Depot.
Reusable Clunky and need to wash;  but great fit, great seal and long life: 1 × half-face reusable respirator 3M 7502 plus 1 × 2-pack P100 [?] particulate filters 3M 2297.   Equivalent to 🇺🇸 USA HEPA, 🇪🇺 Europe HEPA H13, and Tesla Bioweapon Defense Mode.  About US$40 or €35.  The gold standard.
Compact;  have not tried: 1 × N99 [?] Cambridge Mask (Newton) (what it filters, and sizing).   Equivalent to 🇪🇺 Europe HEPA H12.  About US$30 or €25.
Disposable 1 × P100 [?] particulate respirator 3M 8293.   If you get a good seal, equivalent to 🇺🇸 USA HEPA, 🇪🇺 Europe HEPA H13, and Tesla Bioweapon Defense Mode.  About US$10 or €9.
Box of "ear loop" "surgical" or "dental" face masks, available at most drug store/chemist shops.  Not rated.  About 10¢ each, but sold by the box.  Works for family members with mild allergies.  Easy to carry (wrap in a baggie) in your purse or backpack.
Respirator techie stuff:  OSHA Respiratory Protection standard 29 CFR 1910.134.

After purchasing your respirator, please continue:

Happy mowing, vacuuming, sweeping and blowing!