You need an IFR training manual, or a "holding pattern computer". I had to transplant one into my head for the FAA IR.
There's a nifty little diagram that shows the three hold entries - direct, parallel, and teardrop - and when to use them. Worthy learning to draw that from memory.
Yell if you want me to e-mail it to you. Yell likewise if you want "The Instrument Flight Manual" that I bought for the IR and decided wasn't very good. It has all the basics in it, so is good in that respect, but isn't geared to the IR - which is what I wanted.