Things sleep training has taught me:

[1] if the baby's bassinet/play pen/crib is in your bedroom, you're working against yourself. The urge to just bring them into your bed to quiet them down so you can sleep is too strong.

[2] you're going to be really really really really really tired and want to take shortcuts. Don't. They won't work an you'll be putting yourself back a few steps. 

[3] they're going to cry. Sometimes a lot, sometimes just a little. They're going to cry, you have to decide a plan for coping because very rarely sleep training results in no tears.

[4] at 1-3 am (depending on your child's typical unholy hour wake up point in the night) I typically psych myself up so I don't fall asleep with him on the glider, drop him and probably collapse on him as well. Usually a jumping jack or two will accomplish that. 

[5] you're going to miss nighttime snuggles with your baby but remind yourself now you don't have to worry about your SO crushing them in their sleep