There are many resources online to give you tips to achieve better lip syncing, the best way to get the best results is to simply research yourself. The videoes below will help you gain some quick tips, but there are no shortcuts to mastering lip syncing beyond practice.
--- Taking video of talking can allow you to perfectly mimic the mouth, similarly to rotoscoping.
1. Take video or either dialouge your characters say or to simply, common words.
2. Screen shot the moments of pronunciation of a word.
Use these as reference. A mirror handy at the studio can also help with on the fly animation drawing.
Have a code of mouth sounds to refer back to is also handy.
- Lip Syncing Tutorials
- Round class check in
- Studio Time