Zippy! I have a comment about one of the many useful tips you mentioned regarding usernames. I noticed it is possible to change your username as it appears on steemit by editing the "display name" field under settings and clicking the "update" button. As you wrote, the spelling used when you joined will stay "forever" on the blockchain. What I haven't tested is whether a user can be mentioned/tagged/contacted with the edited name i.e. @zippylo, or if it is necessary to use the official username i.e. @zipplyo. As an experiment I edited my display name from the original @mininthecity to @minnieinthecity. Let's see how it works...