Be sure to memorize every primer sequence you've ever used. You don't want to be caught red-handed.
A crib-sheet of buffer solution recipes on your planar wrist wouldn't hurt.
I kid... I kid...
Focus on telling a story. This is what all research is about.
How did you get involved in the project --> why did you pursue the project --> what kept you excited about the work though the experiments --> are you happy with the results (positive or negative)... Finally, you need to weave the story together: this stuff I did showed this-and-this, and it adds a piece of the puzzle to the whachamacallit question. The end.
Depending on your level of involvement in the research, you may not even know what the big story is--you need to work this out with your PI. I know this from the experience of mentoring many undergrads during their "research experience." I personally never like the fluffers who are there "doing research" just so they can add "the experience" to their app. They're dangerous in the lab. Don't be that guy/girl.
Best-o-luck!