Embassy and Visa

It is very important to obtain valid visa from the country you are residing. Most embassies will not accept visa processing for non-residents.
If you have to transit another country, always check if you are required to obtain transit visas. If yes, ensure you have reentry permit.
Some country introduces tourist visa on arrival for selected passport holders, you have to check if you are eligible for visa arrival. If not, kindly apply for valid visa before departure.
Take note the number of days require for visa processing exclude public holiday and weekend. Usually you are unable to take out your passport during the period, hence, you have to ensure you are not likely to use your passport or apply urgent visa if any.
Some country requires you to have valid visa for the duration of stay.

Check visa requirement
**Always counter check with your local travel agent or embassy in case any amendment.
http://projectvisa.com/
http://www.delta.com/planning_reservations/plan_flight/international_travel_information/visa_passport_information/

List of embassy websites base on host country.
http://www2.tagish.co.uk/
http://www.embassyworld.com/

Australia Electronic Travel Authority (ETA)
Check if you are eligible for ETA application.
http://www.immi.gov.au/visitors/tourist/976/eligibility.htm