I have a couple thoughts. I am a long time rhythm guitar/vocalist. Here is one idea, are you a guitarist or a singer? If you are a singer you are playing to accompany and support your singing. Remember this, to support your singing you don't need to be a great guitarist, just a good rhythm player. Don't try to do too much with your playing. I saw a number of people mention practicing at a slower pace, this is a great idea. As a singer you can really stretch out and explore the song when the pace is slower. Find out what works for you vocally, what you can do with your voice to make the song really shine, then incorporate those ideas into the right cadence for performance. Do plenty of acapella, you will have all the vocal nuances worked out and ready to integrate with your rhythm playing. Now you need to find the groove and get your playing practiced enough that it is relatively automatic and then simply let all your acapella vocal practice come to the front. Another good thought is to keep your playing very steady but allow your vocal to work within the cadence, you can be more artistic with your vocal performance but your guitar needs to remain steady. Better guitar player? As a guy that leans heavily on the vocal side I can only speculate but these are my thoughts. First, take my above ideas and transpose them to a guitar first regimen. Learn to sing the song fairly "straight", don't embellish too much. Look for spots where you may be able to inject chord/ lead breaks, chordal melody, playing in octaves, you know, all the cool stuff. Use your timing skills from playing to make your singing right on time everytime. Your voice will now be the predictable rhythm keeper and will allow your guitar work to be more flexible. As a guy that works from the vocal side I recommend that you find some skilled listeners with good ears and concentrate on pitch. Another good technique is to record your practices and performances. The tape doesn't lie. Don't freak out. If you have never heard your recorded voice before you will be in for a shock. Another good tip for an aspiring singer is to copy or mimíc another singers voice, hopefully a good singers voice. The tape will be very helpful here and don't just focus on one singer, try three or four. Worried about losing the creativity your were seeking when you got into music? Don't. Over time your own creative desires will creep in and before you know it your once imitation vocal will become a thing of your own creation. A couple more thoughts. Phrasing is so important, when you are studying a singers voice to copy, pay particular attention to the phrasing, it is so important not just vocally but musically too. Along with the phrasing comes another lightly regarded subject, breathing. You may find that phrasing some songs accurately seems impossible until you apply breathing to the mix. Sometimes a singer may find themselves struggling to hit or hold a note at the end of a verse. This is where a small pause to fill the lungs comes into play. Find a place to get more air onboard and you will find some of those difficult passages become much easier. Remember, you are doing this for your own particular pleasure, play to satisfy yourself and don't sorry about others.