Go no further until you are writing good songs.

Good advice Mike. People are not always the best judge of their own efforts. We tend to judge ourselves by our intentions, and others by their results. When folks go through a creative process, it's hard not to think the result must be 'good'. After all, they were doing their best and surely others can see that and appreciate the effort.
That may be the idea behind why some writers say, just write and write a lot. One gets through a lot of junk writing and eventually a good one comes out of the process. I think Gershwin said he shot for 15 a day.
Learning the difference between 'good' and 'average' is an important lesson that some will never get. The cruelest lie of all is the one we tell ourselves.

http://www.showcaseyourmusic.com/JIMCARLISLE