Fishing came up for the first time in a long while. Had some trouble with the commands and what not, so I thought I'd post a quick how to. Though there is a 'help fishing' command already.
Ingredients: Sinew, Branch
1) break branch from tree
2) acquire sinew
3) attach sinew to branch
Ingredients: Rod, Fishbone, Earthworm
1) attach worm to rod. (This will break the fishbone into hooks)
2) use rod
Or you could just buy and use a net.