Do you have looming deadlines? Now is the time to say No! You don't have to be mean, you just have to be firm. Say no to the unnecessary and the unneeded. You can also say no to the much later and not required now.
Focus on what is needed now. Don't look for new projects or let them find you. When you have looming deadlines it is just the nature of the beast that exciting shiny projects will come charging in. This is always the time they will come looking for you, they really will. Be prepared. Don't let them in you head. Don't put them on your desk or desk top to distract you from your deadline.
Are you about to finish up the school year? Are you almost three weeks away from deadline? This is truly the time to take the words above in the top two paragraphs to heart. Say No now to move forward.