I discovered a few tips that have helped me find things quicker and easier:

1. When you look for something and you finally find it, put it in the first place you looked so next time you’re likely to find it right away since you know where you assume you would put it.
2. When you’re searching your email for something and it takes several searches, when you finally find it, resend it to yourself with as several of the words you used to find it, typed into the subject line before the subject