Sand is the best option and is the only thing you can find anywhere. Other special substances exist but I don't think you have them around the house. My flood damage repair guy told me about this and he also said that sand is good to put out electrical fires when there's a shortage and you don't wanna get burned.

Obviously the best idea is to avoid having a fire in the first place!
Lithium, sodium, and even potassium won't just catch fire spontaneously (although Na/K alloy will do so!). If they do take fire, sand is indeed the best option. Be certain not to use any halogenated hydrocarbon extinguishers (Halon and the like).

If it were a small amount, I would probably dump sand on it. For larger amounts (like 30g or so), I would probably clear the area and let it burn itself out rather than risk inhaling the caustic vapours or blinding myself with the fumes. Of course I'm assuming that you're doing this in a hood or outside in a draft in a lonely place where this is safer to do!

Sand would be the best option for this. This would also be the easiest thing to find. It's better to use this than the other and would definitely would not cause burn.

cedar rapids chiropractic

lithium

Sand.

You could use a CO2₂ extinguisher; N₂ extinguishers are not common. The reactions of alkali metals with H₂O are increasingly violent, but the greatest danger is not from flames (Li is a rather slow reaction and they do not become truly violent until Rb and Cs) but rather the products of the reactions, LiOH, NaOH, and KOH which are all caustic.

that is because hydroxides of alkali metals burn your skin for example, right?

would it make sense to neutralize hydroxides with acids?

That wouldn't be favourable as when acids (nomatter what, even citric acid in oranges) touch strong alkalis (KOH, for example), strong heat is released and may cause even greater fire danger than the metal itself.

LiOH is used as a depilatory, but yes, the alkali hydroxides react with the oils in skin and "burn" it; neutralizing with acid would be a good idea (the CO₂ acts as an acid and forming carbonates. Since the entire reaction is aqueous, fire isn't an issue, but remember that when something hits a liquid, it will splatter. That's why good lab technique is ALWAYS pour caustic materials into the neutral or less caustic materials. Spraying hydroxides with CO₂ extinguishers is likely to splatter NaOH all over the inept, smothering it with sand is the best solution.

People often overestimate the amount of damage that chemicals can cause. In my own experience, the only serious chemical burn I ever saw happened when my younger brother sat on my lab table in a watchglass of nitric acid and copper nitrate and then afraid to tell anyone kept quite until the acid ate through his pants and burned his butt. My eighth grade chemistry teacher used to blow glass and like fire-walkers handled the red hot glass with only his fingers.

If you only take the glass for a few seconds or so, it won't be a problem as both your body and glass are bad conductors of heat.

From the sign on the door to the DP lab:
NEVER USE CO₂ TO EXTINGUISH A METAL FIRE

So yea, use sand. Or cover it with something if that's possible. Better still, don't let it catch fire ;)