What is the best way to treat back pain as a young adult? are there any specific objects i should consider buying like back stretchers, memory foam pillows, etc.? thank you?

Where is pain?: Back generally means low back. Special pillows great for neck pain. 1. Use good ergonomics: stand straight, don’t slouch, lift properly using legs. 2. Exercise needed muscles at least every other day (abdominals , inter scapular, and low back) 3. Eat healthy foods 90% of time,Watch your weight to avoid ‘beer gut’,which will aggravate spinal extensor muscles. 4. Firm Supportive Mattress are a must