To see what entry to use, hold up the appropriate hand, keep your fingers together, and extend your thumb. Orient your hand on the chart so the holding point, be it an intersection, VOR, or NDB, is in the angle between your thumb and index finger (Figure 1.) Your palm should cover the holding pattern. If it doesn't, make sure you're using the correct hand, or rotate the chart and try again.
Imagine that a line passes along your thumb and continues through your wrist. This is your 70-degree "dividing line."
Now for the easy part. Your fingers are parallel to each other, so entering the holding pattern from this quadrant of the chart requires a parallel entry. Your arm goes directly from your body to your fingers, so entering a hold from this quadrant requires a direct entry. All that remains is a teardrop entry. If you look at it, the angle between your thumb and index finger resembles the bottom of a teardrop, so entering from this quadrant requires that you use a teardrop procedure.
The same technique works with the aircraft's heading indicator or horizontal situation indicator. Let's say ATC instructs you to "Hold southeast of the WALLY intersection on the Training [VOR] 330 radial, left turns." In this instance, turn the aircraft so the inbound holding course lies under the indicator's lubber line. Use the appropriate hand as previously shown to indicate the quadrants and the correct holding pattern entry to be used from each quadrant.