Probably depends on one's goals for one's yard.
I grow some of my own food so some tips are really only relevant to people who share that interest.
- Let the grass grow, then cut it and use it for ground covering for crops. Some veggies need to have room to sprout first. Others will sprout through the covering. The covering keeps moisture on the ground and saves you watering, especially during the hotter/drier times. The covering, if thick enough, can be used to stop weeds.
- If you have a snail problem, fill a bowl with beer and put it out where the problem is. They can't resist, and it will cut down their numbers.
- If you grow garlic, it needs a "winter period" first. 2 - 3 weeks in the fridge is sufficient to condition it to grow in the summer.
- Lambsquarters seed is super nutritious, contains all the essential amino acids and can be added to bread. It is considered a weed however, and can take over unless tightly controlled. The leaves are also healthy to eat, just watch the soil you grow it on.
- Radish leaves are edible and contain a large amount of vitamin C.
- When you cut the grass, don't waste it. Set the excess either for ground cover for crops or in places you don't want to cut any more grass for a while. A thick enough covering will stop growth.
Those are a few off the top of my head. Probably not too useful to the typical suburban gardener but it may interest someone.