1. adjusting tension is easy. grab the spokes and pull them together..known as "stress relieving" (google will tell u more how to do this). do this for all the spokes adjacent to each other, it will untrue the wheel a bit. then tighten it a little bit to get it true and u're good to go.
2. makes no sense to me. but i'm thinking the philosophy behind loosening every spoke is the same as stress relieving.
3. if there's no big issue with ur rim, the hop can be cured with proper truing. spend some more time on it. truing stand or patience will do the trick. remember: always true several spokes at a time in small 1/4-1/2 turns.
sd