I am wanting to do this today, considering i have an order for tomorrow, and i'll be baking today. when do you poke the holes in the cupcakes ? when they are completely cool? or when they come out of the oven??
and how big does the hole need to be?? toothpick size or straw?

help please!

You make a simple syrup out of equal parts sugar and water and bring to a boil and cool. Then apply with a small brush. Don't poke any holes and wait till everything is cooled, including the cupcakes.
Just an aside, cupcakes usually are pretty moist (depending upon you batter) because they are small. I don't know if you need to do this for cupcakes.

i've seen where a lot of people do this to hold in moisture...the cupcakes aren't going to be eaten until tomorrow...

If you are baking today they should be fine tomorrow without doing that, providing they are kept in correct conditions.

Line up your CC on a baking sheet, then take out , cover with some plastic and freeze. Take them out and loosen the plastic, defrost and then ice. Not only tightens the crumb, it also makes them super moist.

i do the same thing as minicuppie. after i take the cakes, cupcakes etc... out of the oven, i let then cool for about 15 min then cover and place directly in the fridge or freezer depending how far in advance i do them. by doing this with cakes, it makes them better to carve and mare dense to hold up to the weight of fondant.