Outdoor walkway lights are a great idea for fun, flair, and safety. Try these other fun DIY rope light ideas.
Railroad tie and gravel garden/side yard walkway. I usually don't like gravel and railroad ties but this might be a workable and less expensive option than pavers for backyard walkway to screen porch
Aesthetically, you are going to want to coincide with the current style of your dwelling, particularly if you are building an attached deck.
The gravel path ~ 7 Classic DIY Garden Walkway Projects
Floor Designs Ideas: A pathway lined in brick with stepping stones and pebble filler.real bricks, limestone rocks from back yard, and that nasty pea gravel i hate.hmmm maybe it will look better in the front yard.
Landscaping timber stairs Portfolio - Jenny Short Garden Designs for the overflow area
Plants are the strangest People: Beautiful & Enchanting Garden Paths