Hi TAB, Even though I have never invested, I have a suggestion. Lets say that you have found a stock that you like. Like these reit's that pay dividends at a high yield. Look at the history of the stock prices. Like the 52 week HI/LOW or the five year HI/LOW. Divide the Hi with the Low this will give you a idea of the range of the stock prices, next compare the current price to it, If the price is close to the top you may want to start you AIM with 20% stock and 80% cash. If the price is near the middle then use 50% stock and 50% cash. If the price is close to the bottom try 80% stock and 20% cash. You can of course adjust this as you see fit. You can use the 33% stocks/66% cash or 66% stocks/33% cash also.
Come see me at Systematic Investing group #board-966 lets talk formula plans.