me and my 5 cats are praying for a speedy return of Oscar

Print up fliers with photo, post Lot Pet in paper/petfinder/craigs list (only with cell number and a new email addy- to help filter out creeps), go to shelter (don't just call them), put up fliers at local gas station/vets/grocery etc. Also, put out favrite food and call for him during daylight hours too. {Some cats hide at night and are lost/out of their element}

One tip that always has worked for me: gahter up the local kids and tell them cash reward to whoever finds your cat first. $50 will motivate just about any preteeen kid to search till the cows come home
*note: I tell parents I am doing this so they know I am not a weirdo