I currently working on recording some songs from my house and was wondering where should I start in trying to record vocal harmonies similar to what you would hear on a bon iver song or a city and colour song?
copy the melody using 5ths, then change the harmony around a bit so its not a mirror image of the lead vocal line

generally you vvanna go for opposites betvveen the vocal harmony and the lead part, so if the the melody in the lead is jumping around a lot try to keep the harmony a bit less mobile or even stick on the same note a fevv times even though the lead part changes notes and vice-versa

hopefully that vvas somevvhat coherent, i'm tired and vvasted