There is taxi-van service that can be used from Split and Makarska.
There is a ferry service from Ancona, Italy. Take a ferry to the Port of Split and than use the bus to get to Omiš.
There are local boats that run several times a day from Islands of Brac, Hvar, Korčula and Vis. Take them to Split and then use the bus or taxi service to get to Omiš.
You can get around the city by car, local taxi and bus service, or tourist trolley. You can also rent a bike or moped from tourist agencies. However most people find it sufficiently comfortable to get around on foot, because Omiš is relatively small city.
Go to the basketball, soccer, and water polo games
Traditional folklore clothes
Omiš post cards
Handmade sculptures with city symbols
Try Dalmatinski Prsut-Dalmatian smoked ham (ham smoked and dry on specific way)
Fritule and Krostule (home made cookies)
Jela ispod peke (meals prepared in the traditional way at the local restaurants)
Local see-food specialties
Rakija: hard alcohol made either from grapes or plums
Prosek: sweet liquor
There are apartments for rent located all over the city that are relatively inexpensive.
Omiš budget apartments [http://www.apartmanija.hr/apartmani/omis, Here you can find various presentations of budget apartments in Omiš. You can contact the owner directly and pay no agency commissions. The accommodation price can be cheaper up to 40%.