record as clean as possible then eq and add fx after
invest in a decent de esser plug in - i recommend blue tubes
get a good sound at source rather than trying to fix it in the mix
always record in a separate room as your vocalist will feel less pressured if they are in their own space
make sure you get some bottles of water in and keep them chilled for your vocalist - little things like that make a big difference in peoples attitude to working for you
ensure you have a pen , paper and table near the mic for the vocalist
i like to record in my hallway with the mic set up at one end facing the length of the room as you get a good natural reverb with the space behind the singer
no matter what the vocalist says keep the headphones volume as low as possible for them as you do not want bleed on the vocal channel as its a bastard to deal with
When it comes to recording vocals the most important things are a good pre, a good mic running through a good compressor if you've got it (whilst riding the threshold) and concentrating on getting the best source material you can. Makes the rest so much easier.
As for a vocal plug-in insert chain, it's like the rest of production. A lot of specific plug-ins doing their own minute individual jobs make the difference between just using one eq and one compressor.