Of course!
End all be all of Rules for Appetite Increasing: Eat by the clock, not by the stomach.
For a week straight, eat every hour on the hour. Something small, a few scoops of peanut butter, and something larger at appropriate meal times. But *every* hour. Your body will quickly adapt to constant feedings and decide that storing fat aint all it's cracked up to be, because it will *expect* hourly feedings, whether it is hungry or not.
After the first week, eat every 2 hours... then a few days pass and you eat every 2:30 hours, and if you feel necessary, every 3 hours. Most people are quite happy eating every 2:30 - 3 hours, adapt as necessary. As you increase the time between feedings, increase the size of the feedings. Where you may have had half a peanut butter sandwhich with 4 oz of milk at one feeding, eat the whole thing now with 8 oz of milk. Not necessarily doing that exact, but you get the idea. Before ya know it, you'll be eating by the clock on a daily basis and not even question whether you're hungry or not. You'll just do it because your body will assume that you're going to feed it.
And that right there is the key to eating enough food... don't listen to your hunger, the same way you don't listen to your thirst. If you're thirsty, you're already most of the way to dehydrated.... so never be thirsty. If you're hungry... well then you're screwing yourself on gains and better get to eating more/more often!
This is much easier for hardgainers because they can consume the food and adapt quickly. If an endomorph is trying this approach, be careful on how many calories you're taking in *overall.* It becomes very easy for non-ectos to overeat and just end up a tubby b-stard.
Happy Gorging!
PS: Oh.. and major karma to you BlindFaith... great post for the less genetically fortunate. (guys like me)