Take breaks from sitting every 20 to 30 minutes. Sit in a chair that provides support to your low back. Kneeling to do a bed corner is much better than bending forward while making the bed. Do not try to reach across the bed to do an opposite corner. Walk around to complete the far side.
Squatting is better than bending from the waist when unloading a front-loading washer or dryer.
Place the opposite hand on counter top for support to keep back straight. If standing at a counter for extended periods of time, place a foot on the bottom shelf of the open cabinet below . This reinforces a good posture while washing dishes. Kneeling on one knee can also be used to load and unload dishwasher. Bend at your hips and knees, not your waist.