I pitched my yeast 24hrs ago in the wort and there are no bubbles in the airlock. What should I do?

24 hours is not a very long time in yeast production, some strains can take anything up to 36 hours to get going. Its also worth noting that bubbles from the airlock is not a reliable method to way to judge if fermentation has started as there could always be a leak somewhere for Co2 to escape. If you take a gravity reading after 36 hours and measure with a hydrometer this will show you if fermentation has started when you compare this to your Original Gravity reading. Check out our Yeast video for more great advice on having a good ferment.