As a parent of multiples and a singleton; any child in their own right, with or without siblings, it is very important for the parent to have one-on-one time with them. This could be mommy and me, daddy and me time, or both.
As a multiple myself I know it's easy to lose yourself as a child and not have an identity outside of your multiple sibling. Some times people don't even know your name and resort to referring to you as "Twin". On the surface no name is OK, I mean you did share the womb with this person, but when you get down to the core of it all, we all have a name and should be called by it.
As a parent I plan to expose my children to as many activities as possible and encourage their separate interests if they have them. As convenient as it would be to have all three in the same activity it's going to be ok and up to us as parents to embrace their different activities and interest at a certain point outside of each other if that's the case.
Right now for me, my daughters are 8 months old. Bath time is our dedicated one-on-one time...we also get one-on-one if they wake up during nap time or at bed time if someone isn't complying lol. For my son, when I take him to school or to karate if the girls aren't with me that's our special time. It gets challenging when it comes to my husband and the children because he works a lot, but sometimes I'll remove my self from the equation, just so he gets to have the one on one time with the Kids, especially Kanon at this age.
Having triplets, life is about trying to shave time off of the process, what can I do to make things quicker and easier for me, but this is one of those things that needs plenty of time and attention.