Yea i do the same thing, i used to spray them all over the place but now after the break between season i would go down to the nets at the highschool just down the road from me and bowl for about an hour and a half a day
good for your fitness and your rhythm. i have bowled the most consitent i have since i start playing cricket. and i also bowl a lot faster, i used to be called tangles because i bowled a bit like maxy walker. slow medium inswingers but i always put them in short... my captain plays like ricky ponting, best puller of a ball ive seen. and he would destroy me
i changed my action, more like mcgrath now. and i practiced practiced practiced and i am now first change instead of like 3 change lol
batting i use a golf ball and a cricket stump. and if i want to practice my foot work to spinners i use a tennis ball against to fence. but it all works... also a ball on a string works well
but nothing works better than a bowling machine. go down to your local cricket coaching place, time for a plug here for people in brisbane, I go to a place in ennogera called cricket works. the guy that runs it Brian really knows his stuff and has some good bowling machines, he has helped me alot. Im still not a great batsman but ive got from last season average of 1.5 to an average of 12.5 so thats a good start