There is a very good post in the forums called '' Tips on chipping, pitching a flops''
Well worth a read. Some very useful info in it. Helped me tremendously.
One tip I can give you though, which I found very helpful, Do not use any less than 75% of your meter strength for any of these shots. it just won't work. And do not try to chip any further than 2ft off the green. They just will not reach. If you are any more than that distance, use a pitch or a flop. Punches are quite useful as well. Try them out in practice.
Check it out.
MEL1950