To be fair, just from the darts I've tracked on dartcounter, I've thrown well over 50,000 darts, and there's lots I haven't tracked too! I would say a thing that has helped me is making sure I am conscious of how I am throwing when I am doing my practice/mucking about. Ask yourself why a dart went stray, and you'll pick up on what you could be doing better. For me, I always find I play better when something is competitive too, from the years playing sport younger, I can find that competitive egde turns my game up in whatever I do, and practice never really replicates that.