night shots

What's the proper way for taking night photos with a film camera, I currently have and have been using a pentax k1000 and haven't taken any night photos.Could someone please give me the run down on taking night photos when to use,with and without external flash,I have bought 800 iso film too use...

A few shots I took while walking around the recently renovated canalside area of downtown buffalo last night! Enjoy! 1.) Sunset over Lake Erie 2.) Canalside Lighthouse 3.) Light Show on a Grain Silo (an ode to Buffalo's Heritage) 4) Another night shot I found interesting