For a small amount:
* немного (nyemnogo) - This is the most common and versatile option. It can be used for both countable and uncountable nouns.
* мало (malo) - This means "little" in the sense of "not much." It's often used for uncountable nouns.
* чуть-чуть (chut'-chut') - This means "a little bit" and is more informal than "немного."
For a short period of time:
* немного (nyemnogo) - This can also be used to mean "for a short time."
* чуть-чуть (chut'-chut') - This is also used for short periods of time.
For small size:
* маленький (malen'kiy) - This means "small" and is used for countable nouns.
Here are some examples:
* Я хочу немножко чая. (Ya khochu nyemnogo chaya.) - I want a little tea.
* У меня мало времени. (U menya malo vremeni.) - I have little time.
* Подожди меня чуть-чуть. (Podozhdi menya chut'-chut'.) - Wait for me a little bit.
* Это очень маленький город. (Eto ochen' malen'kiy gorod.) - This is a very small city.
The best word to use will depend on the specific situation and the noun you are referring to.