How can you keep your house smelling fresh? besides glade etc etc!?

my gfs co worker told her she uses 1/3 fabric softer any kind, and the rest water put into a spray bottle, spray it around, and this keeps her home smelling fresh. what do you think any advice? thx! im trying to find some inexpensive ways to keep the house smelling fresh without spending money on all the pricey stuff in the store if possible. i love a good smelling home especially when i walk in the door from work. any ideas?