Steve.....You want to dig? Gotta get a toothbar! The most productive and least expensive "attachment" you can buy. Tons of info on here about tooth bars.
Always give a quick glance behind you before you hit the reverse pedal....dogs, kids, cats, cars, siding, trailers, expensive plants, fences, trees, shrubs, people...especially if you get a tooth bar. They are nasty.
Turn the engine off when you leave the machine. You don't need to the let the diesel idle like a 18 wheeler. Especially when you are near the PTO or the loader.
One other thing I can think of is pulling stuff. Always use the draw bar. There are some good recent articles from Skypup in the safety section. Definitely worth reading what he posted.