Tension can interfere with memory, so learn to relax. This will help you think more clearly. Good nutrition also keeps a sharp mind. This will surely help your brain power improve. Do not drink too much alcohol, this impairs memory.
Depression is often a cause of memory loss.
If you are depressed seek medical advice and attention. To spur creativity talk to encouraging, not discouraging, people. The best thing to remember and live by is to exercise your memory and your mind. Try new things that may not even interest you. Find new people to talk to, or go out to a new restaurant.