If you use a bottom pour pot and multiple cavity moulds...set up the pot so that you can see the melt coming out of the spigot and into the sprue plate...hit the hole centered, don't ricochet off the sprue plate.
If you fill the farthest cavity first then raise the back of the mould so that the excess overflow flows away from the next empty cavity to be filled.
If you start with the cavity nearest you reverse the procedure...lower the back end of the mould so that the overflow flows towards the rear and away from the next empty cavity towards the front.
Be generous with your puddles, as you get your timing right you can leave less sprue so that it doesn't overflow the plate sideways...it just takes time doing it many many times and it will all gel.
As your pot empties you may need to adjust your spigot more open as the pot pressure is dropping as it empties.