1) Verb tenses changing or going back and forth in a weird way. This is one of the mistakes I see most often when critiquing song lyrics. Switching between past, present and future can really mess your lyric up if you are not super clear about what is going on.
Throughout my 20 years as a professional songwriter, I’ve noticed there is not always a large difference in talent level among most creative people. Why, then do some songwriters seem to have an over abundance of fans buying their music and other writers struggle to sell the first song?