Things that are out of trend.

Cold shoulder/Shoulder Cutouts is completely out of trend. 

Neon lahengas / anaarkali are not in trend. 

Matching color is not important, you can wear three different colors. 

Poncho/short length cape are completely fade out. You can use a long poncho. 

Cullotes with kurta are out of trend. You can use with top. 

Side slit hanging/tassels are out of trend. 

Multiple slits in a kurta are completely out of trend. 

If you want to go with trend, it's very important to know that what is in trend and what is out of trend.