1) She thriftily saved money by packing her lunch for work every day.

2) The couple thriftily shopped for furniture at thrift stores.

3) He thriftily repaired his old car instead of buying a new one.

4) She lived thriftily by growing her own vegetables and fruits.

5) The family thriftily reused plastic bags for grocery shopping.

6) He managed his finances thriftily by setting a strict budget.

7) She thriftily made her own cleaning products using natural ingredients.

8) The company thriftily cut costs by switching to energy-efficient lighting.

9) They thriftily planned a budget-friendly vacation by using coupons and deals.

10) He dressed thriftily by shopping at second-hand clothing stores.

11) Sure, here are the sentences using the word "thriftily":

12) She managed her expenses thriftily by buying second-hand items and using coupons.