I need help with short term memory. Any suggestions?!

I need help with short term memory. Any suggestions?

I can't remember directions, where I put my car keys, simple instructions, etc.

The first and most important question is whether your memory problems are health related. If you drink alcohol, stop drinking, and your memory will improve. Eat a good diet and get very regular sleep. After that, there are plenty of simple things you can do, like always putting your car keys in exactly the same place every time, writing down directions and instructions and making sure you understand them when you first get them. After that, if you find the problem is too big and not getting better, see a docotor. You might have an attention deficit that could be helped with counselling or medication.