Some great date ideas are hiking, museums, beaches, or theme parks. You don't need to look like you walked off the runway, but do look like you took a minute to think about your wardrobe!
Sagittarians are rather physical people and thus the outdoors is a great attraction with them. As a couple, you may disagree about the little things in life. Look for hints that your Sag is ready to commit. Pay attention to your look.