Transilluminator is a must, for me, at least. Keep it in your pyxis so no one steals it.
My rule is if I don't see it, I don't stick. Start looking and see what you can find. If you don't see anything, don't stick blindly, but if you see it you may surprise yourself, especially if you are a good stick on adults.
My other rule is, I only stick twice. If I can't get it in 2 sticks, I find someone else.
As far as it turning your stomach to stick a baby, you have to think of why they need the IV, and frame it in your mind as what you are doing FOR them, not TO them.
Those are my thoughts