Never undersell yourself
In 1991 Gerald Ratner wiped £500 million pounds off the value of his business following one speech after suggesting the merchandise his jewellery business sold was total crap. So what does this have to do with you? Over the past year or so I have noticed a lot of up and coming authors being incredibly self-depricating. Phrases along the lines of "I've written some stuff but it's not very good." Why would you say that? It is all very well to be coy about your ability but you are essentially saying "Do not bother reading my work because you will not like it." I get that it is a defence mechanism whereby you get the dig in before someone does it to you (hell, I've done it myself so you can call me a hypocrite). There is a very British tradition which suggests we should not be too brash or bold, that we should not tout our wares in public. And that can be fine to a degree. I personally think you should be promoting the value of your writing but I caveat