Well, Guitarshredder666, what you got to do, is sit with each song that you make, and start with practicing the song and reading the lyrics in your head, as many times as you can, until you can read the lyrics on time with the tune. Then you should start singing outloud, with your guitar playing until you can get it right. This is what I have been doing for years, and it seems to work fine, so hopefully it benefits you as well.
PS> Do it by yourself! It will get really annoying to your band to hear you do this a million times..trust me.