If you are a person who knows somebody who knows somebody, then being a concierge may be a source of additional income when that good ol’ writers block hits. This is also a good business to start if you know many businesspersons in your area that would not mind paying you a referral fee.
Personally, I don’t know of anyone who does this on a working person’s level but I would imagine there is a market for such since people are so busy these days. Being a single parent, commuting long distances, and attending classes that help solidify job security are reality for many, meaning there is little time to do much else.
Some people build clientele by word of mouth or may already work as a virtual assistant that offers these services. From what I have read, there is no formal training but there are online courses as well as books on Amazon about how to get started.
Finally, you may hear about concierges making $70K and up a year but keep in mind the audience they are catering to, which is usually the very wealthy and discriminating. However, the local corporate executive may also refer your services to his associates and you may even have virtual clients in addition to the ones in your area.