We only applied for a number of Visas beforehand and decided to get all other visas sorted on the go. You can apply for most visas online. However, it was thought to be beneficial in our case to get a 12 months visa for India which was applied for at the embassy. Below link is helpful to quickly check visa requirements for different countries.
Check out VisaCentral for more information on different countries based on your citizenship.
We applied for the following visa in advance.
- ESTA for the US