Try to look for The Teapot first as they are those brighter stars in the constellation. Then slowly link the stars together.
If you have a binocular, The Sagittarius is very fun to watch as a narrow but bright strip of the Milkyway runs through it. It's the light blue colour strip in this picture. Apart from that, M6, M7 and M8 are very easy to be spotted with a binocular. 10x50 is a sufficient to see them and some other fainter clusters around. It's possible to see them with naked eyes but you will need a very clear sky and very dark surrounding.
I'm yet to see the whole constellation as the weather wasn't good enough for this few weeks. Although I had spotted The Teapot in a few past watching session. Anyway, the Sagittarius will be around for some months onwards and it's impossible for me to miss this interesting constellation.