One sure-fire way to stay creative: force yourself to learn something new.
Say and do what you mean, but never say and do it meanly.
Pale ink is better than the most retentive memory.
Surrounding yourself with creative, imaginative people is a good strategy for success whether you're an entrepreneur seeking innovation or an artist looking for inspiration.
Make the second effort your second nature.
Time is free, but it's priceless. You can't own it, but you can use it. You can't keep it, but you can spend it. Once you've lost it you can never get it back.