Hi Bobbydazzler,
It depends a lot on your strike rate and personality type.
Partypooper has a thread called
cover to win/target, which is worth a look. It works for his system but won't be for everyone, as you have to be able to cop a few big hits, for long-term gain.
If you use any kind of target betting, make sure you have a safety brake so you don't lose your shirt.
This retirement staking system gets a lot of press and seems to be quite logical:
http://www.grandstand.com.au/retirement.html
It also depends how much time you want to spend on working out your staking.
You may be best off long term with level stakes and focusing on getting a better price for your winners. A really good article that was posted a few months ago is:
www.trb.com.au/best_prices.html
If you're backing longer priced horses you can often get ridiculously good prices on Betfair. For instance a horse yesterday was $14 Unitab and I secured $30 on Betfair, though for a small stake.
Best of luck Bobbydazzler, may your systems long keep producing!!!
The Schmile