Are you backing up all your research? On his blog Family Tree Knots, Ken has a great series he started back in December about backing up. He includes an overview, local backups, and cloud storage. Check it out.
On her blog, Family Folklore, Sue illustrates why it's so important to slow down and analyze everything. It's part 4 of trying to identify people in a record. She does a great job, and trust me. You just need to go read it. [Then go read the other parts. They're that good.]