I'm so not afraid to admit that I spend plenty of time wearing jeans and long sleeved T-shirts. That combo is just SUPER convenient when you have little kids.
Is it possible to make jeans and t-shirts look pulled together? You betcha!
How? You know my answer--accessories!
American Eagle Favorite Boyfriend (similar)--I got mine from Plato's Closet for $18
Gap Long-Sleeved T (similar)--$15--I got this 3 years ago
Orange Scarf (similar)--Plato's Closet for $5
Green Bag (similar)--Plato's Closet $10
Sandals (similar)--Forever 21--$7
Bracelet (Premiere Jewelry)--a gift
Just so you know, I love my "newish" bag. It's a Kenneth Cole Reaction regularly $299 but I got it for $10. Be prepared to see it with lots of my outfits!