What equipment do you have available? If you have multiple mics/pres, then try a few out with the vocalist to see what gives you the best sound for their voice. In general, use your best mic/pre combination. You can use a pop-filter if you have one and the vocalist is prone to percussive enunciation. You can also consider using a compressor is you can get a decent sound with it inline and the dynamic range of the vocalist is wide enough to require it. If you're set up for it, you can also try adding some reverb during tracking (but not printed) to help with "performance ambience".
In terms of mixing vocals, go by the song and style of the band. Typically an upfront, clear vocal is good. You can add a bit of reverb to give it a sense of space. Sometimes a low-mid eq cut can help clear up an otherwise muddy sound--but if it was tracked well it may just sit in the mix fine.