Hotel bookings
If you're booking hotels independently, look for deals that don't have cancellation fees attached.
Then snap these up while you shop around as you can switch deals later on if you find a better value room.
This can pay off when booking in advance, say, for a big sport event like a Formula 1 Grand Prix.
A tried and tested tip from one of the OiiO Tours.com team is to check hotel prices well in advance, then check back a couple of days before the event.
Many travel firms block book hotels but if rooms don't sell they may be sold off cheaply a couple of days before.