I wear neater, shorter tops, so tshirts or jumpers or thermals in winter that aren't long in the body, so they sit nicely at the waist or tuck in easily.
A neat fitted cardi works well too, so in reality you are gonna get used to showing your bum shape, which many of is covered loosely when wearing skinny jeans. And since these jeans/trousers are not tight fitting, you make sure to choose a pair that has decently placed pockets so your derierre looks lovely 
Alternatively, a long baggy jumper can still look great with wide leg jeans, I see plenty young women doing this, it depends on what you prefer. I like to wear neat tshirts or jumpers and a long wool coat, or a short jacket. Sometimes a neat vest or cami with a soft, cashmere boyfriend cardi.
With footwear I go for converse or my usual docs. A hiker boot looks great with wide jeans (and a chunky sock) as do heeled boots, chunky trainers or platforms.
To be honest, anything goes really, I think it is just getting used to a different silhouette, which is a bonus for me as I missed it so much during the skinny jeans years. I am so happy to not have to plaster everything against my anatomy like a disco queen from the 80's any more!
Look for fitted plain tees with long sleeves for winter, smart or casual (white company or Hush for example) a nice, long corduroy coat, a long puffer if you like trends, a decent fitted Henley top in cotton or kitted, a slouchy but shorter length cashmere or merino jumper.