see which commit the stash was based on (note if you don't give a stash a specific custom name, it tells you this in the name by default)
git show-branch master stash@{0}
apply stash to current working directory, removing the stash if successful
git stash pop [optional stash reference such as stash@{0}]
delete a stash
git stash drop [optional stash reference]
tips
I prefer to make branches, then just type git stash save; then, when I run git stash list it shows me WIP on <branchname> so I know what that stash was about, rather than staying on master and naming a stash