Best thing I ever read was "How to talk so children will listen and how to listen so children will talk" the whole series by these authors is amazing. They changed the way I dealt with my kids entirely.
Basically the most important thing is less words and more action. At 14 months when she does inappropraite things put her in a time out area--maybe a playpen with no toys or whatever....for like 1 minute or till she quits crying. No long times in time out-they forget why they are there. Eventually she will get the picture you are not going to interact with her or tolerate the inappropriate behavior.
As my son got older-if he misbehaved in a store--we went to the dressing room and he had to sit in time out for a minute or two while I pretended to write a note or look at clothes or whatever till he calmed down. At first it takes lots more time but after they understand what you are doing, in the longrun its less arguing "no" etc.
Also say the behavior you want not the one you don't want. Example-say "walk"...not "don't run"...say "food goes on your plate..or in your tummy" not "don't throw your food". Its a retraining your words but a much more positive way to talk to your chld his/her whole life!!!
Last--use humor with your child! Remember to have fun. Not ever sarcasm but when they are upset about wanting an drink when out are in the middle of traffic..."me. too, when I get home I am going to get the biggest glass of super duper cold tea...oh I think my glass is going to have to be about 1 foot high so I will have to hold it up with both hands...how big is your glass going to be? Oh, as big as the swimming pool?....etc"