Use a non-slip rug pad or mattress gripper between the mattress and bed frame
Place rubber shelf liner or anti-slip mat under the mattress
Tighten the bed frame and support slats
Add a headboard or footboard to help hold the mattress in place
Use fitted sheets with deep pockets to reduce shifting
Center the mattress properly on the frame
Attach Velcro strips or anti-slip straps if appropriate for the bed type
Use mattress corner grippers or bed suspenders
Replace worn or damaged bed frame components
Choose a mattress size that fits the frame correctly