Some suggestions:
- Watch that the road doesn't become a distraction- either minimize it in the shot completely, or look for a way to make it an interesting part of it.
- Look for interesting angles on the subject.
- Watch the light- light behind your subject is going to either underexpose your subject or blow out the skies.
- Dead-center framing should be avoided- makes it look like you were taking the shot to keep a record of what the building looked like, not trying to generate any artwork.
- Try to shoot with either blue skies or interesting skies--- plain boring overcast days will ruin a lot of otherwise nice shots.