It can be pretty easy to lose your throwing knives if you are throwing them in grass that is tall. Some thing you can do to keep from losing them is to put some brightly colored tape around them so they are easy to pick out. Or an alternative solution could be mowing the grass so it is shorter in the area you throw in. Or just throw in an area that does not have tall grass.
You should always take your time when throwing your knives. There is no need to be in a hurry. It is like any other sport – to master it you must first learn the basic techniques in a methodical fashion. Then when you get that down you can then speed up your throwing.
An overhand throw is one of the best ways to throw. Try not to use a sidearm throw. It won’t be very accurate.