Volume:
* Loudly
* Softly
* Quietly
* Whispering
* Shouting
* Mumbling
* Haughtily (speaking with a sense of superiority)
* Boisterously (loud and lively)
* Sotto voce (in a low, hushed voice)
Pace:
* Quickly
* Slowly
* Rapidly
* Hesitantly
* Ramblingly
* Curtly (short and abrupt)
* Glibly (smoothly and easily)
* Deliberately (carefully and intentionally)
* Hurriedly
* Haltingly
Tone/Manner:
* Warmly
* Angrily
* Sadly
* Joyfully
* Sorrowfully
* Humorously
* Sarcastically
* Seriously
* Passionately
* Confidently
* Embarrassingly
* Honestly
* Rudely
* Politely
* Warmly
* Coldly
* Cynically
* Kindly
* Patiently
Clarity:
* Clearly
* Confusingly
* Vaguely
* Articulately
* Incoherently
* Eloquently
* Fluently
* Stuttering
* Stammering
Other:
* Frankly
* Honestly
* Candidly
* Ironically
* Ironically
* Facetiously
* Seriously
Phrases:
* With a sigh
* With a smile
* With a frown
* With a chuckle
* With a sneer
Remember to choose the adverbs that best fit the specific situation and the desired effect.