Right now I am eating 3400 calories for bulking up. I am 5'9, weighting at 150 pounds. I hope to achieve twenty more pounds within the next year.

When and how often do I increase my calories and by what amount? Up to what amount? How do I know when I need to increase some more?

I've read somewhere on site that it is best to go over a thousand calories more than your regular bulking up diet every few weeks for three days and go back to gain more weight for muscle mass, do you think this is a good advice?

My ratio of carbs/fat/protein is 43/33/24

usually 1-2 lbs per week is good rate.

And instead of keeping 20lbs, check your bodyfat too. If your bodyfat is climbing too high and muscle mass not much, then you might have to cut back a bit. If it's the other way, then you are good.

1 pound a week is really hard. I'd be lucky and thrill to get 0.5 to 1 lb gain a week.

As for the diet: try to consume 1-1.5 g of protein per lbs bodyweight. You carbs is good just eat slow or fast digesting at right time. Always drink your whey after workout and casein / cottage cheese before bed. I would not go out of my way to eat fat though; it will come with the food. Take some fish oil pill. Keep measuring yourself consistently in the morning to track your weight.