How do you manage toddler tantrums?

[OliveCane]

My LO has started tantruming. Whats the best way to manage them? She will scream for 30 minutes just because she didn't get her way! What do I do? Is it best to ignore, cuddle or distract?

Any advice please...14 month old has started becoming very unsettled at bedtime ...for hours !
Brand new baby ( 1 wk old) in the house but it started a couple of weeks prior to his birth......the toddler gets massively upset despite previously going down very happily......she's now a nightmare.
Pls help.