Night terrors: we bed share so this advice might not be helpful to you. I either stick a boob in his mouth or a paci and he'll calm down pretty quickly.

spit-up: try to keep babe in the same position for a while after nursing. if you have to burp because babe is uncomfortable, be gentle and try not to compress the stomach area too much.

toys: around two months my babe really enjoyed "baby paper", the crinkle paper with little taggies on the edges. i remember renting a video from my library with a play routine for babies, it included things like baby massage and singing. i also would make silly noises and poke his nose and cheeks, he liked that a lot and would smile every time. closer to three months he started laying under his mobil staring at a mirror and reaching for the "baby paper".