I've found that DD (2.25 years) wakes a lot just for the comfort of knowing we're here. It's exhausting for me, but I want her to know NOW, before she can get into any real trouble, that we're here for her. So one of us gets her from bed, I usually nurse her back to drowsy, and then put her back in her room. (The doc also said kids this age get night terrors, and then they can't get back to sleep, so I'm all for comforting her through that!)
Lately, though, DH has been going into her room and just talking to her calmly, reminding her to go back to sleep, telling her we'll see you in the morning. (If I go in, she'll just wake more and want to nurse.) It reinforces what I tell her when I put her to bed: Sleep through the night, we'll see you in the morning. More often than not, she'll at least sit down and get quiet, and eventually she falls asleep. Sometimes she will talk herself to sleep.
YMMV, of course, but good luck!