I don't know about websites, but have learned a thing or two.
First of all, good stage presence takes time and practice. Being comfortable on stage comes easier for some than others. Someone with a natural gift of gab and comfort around people brings that to the stage with them. Banter isn't necessary, however. I've been to great shows where the band doesn't say anything.
The biggest thing (IMO) is
no quiet spaces. Thirty seconds or a minute with nothing coming out of the speakers, be it music or talk, lets your audience drift, unless it is on purpose. In a band, often one person can be the talker. If you are solo, you gotta do it. Great asset to have if you are solo and need to change a string in a set.
Something I've noticed. Many times when people talk between songs, they talk softly. They sing loudly, and the mic is set for that, then when they talk between songs they sound like they are mumbling. Get right up on the mic, and speak in a louder than usual voice, like you are trying to talk to the crowd without a mic.
Have a set list. You don't have to stick to it, but it helps avoid those times when everyone looks at each other and tries to decide what song to play. If the audience calls out a song you know, let yourself play it if the time is right. I've been in a situation where someone asks us to play a set closer in the middle of the set. I try to make some excuse to put it off. "I gotta try to remember the lyrics first" or "hey, we sort of know that! we'll work it out on set break", without freezing up or putting them off. Then when we play the tune they are very happy.
To me, it's about making the audience comfortable and engaged. And making it appear that nothing is amiss if you break a string, or need to change a drum head or battery, instead of freaking out. For the most part, if you stay cool, they will. They smell fear.
Be prepared. Have extra strings, tuner, lyrics, sticks, heads, batteries, batteries, more batteries, all the right cables, everything you need. Count on the venue for nothing. Need tape for posters? Bring it. Need a guitar stand? Bring it. DI box? Bring it. Stool? bring it. Then go buy some more batteries. Make sure they are fresh every gig. Organize your shit at home so set-up takes as little time as possible. Got 12 pedals? Make a board. A quick set-up lets you relax, tune, drink, hit on chicks, etc. IMO except for drums, if you can't set your whole personal rig up in ten minutes or so, you suck and are underprepared.
Know where and when you are playing. Have a contact person and contact them. Know load-in time, route, soundcheck time. Know how long it takes you to set up and plan accordingly. And plan for things to not go totally smoothly. Like it takes you a half-hour to set up, and a half hour to soundcheck, and you get fifteen minutes for both. Keeping your cool when things go to hell is very important, and can make or break a show. Perception is king. Have a contract. Follow it.
There is more, but that's all I can think of right now.