Simmer uncovered to reduce excess liquid
Mix cornstarch with cold water, then stir into the stew
Mix flour with cold water to make a slurry, then add it
Toss beef or vegetables in flour before browning
Mash some potatoes or beans into the stew
Stir in instant potato flakes
Add a beurre manié made from equal parts butter and flour
Use a small amount of tomato paste
Add a roux made from butter and flour
Blend a portion of the stew and return it to the pot