Personally, I would imagine that I would start with bullet, which relies on intuition, to warm up. Once I'm warmed up and my brain ready to think quickly and alertly, I can move to blitz where there is some calculation, and finally to rapid if I feel like it where I can calculate even more. I think it helps that I'm a naturally slow player, so it's much easier for me to adjust to longer time controls from short ones. But it's probably different for everyone.
Rapid/Blitz/Bullet Session: Which order is Best?

In FIDE matches, the serious long games come first, then rapid tie breaks followed by blitz is the norm.
Some tournaments use a blitz tournament to determine the order of play in the slow event, but that is usually held the day before the main event.
Since I believe that standard chess takes precedence, I would rather play a rated standard time control game first, and any blitz or bullet at the end of the day.
If you are playing one long chess session, is it better to start off with long time controls, and work towards the shorter ones? Or is it better to start out short and go longer?
For example, if I'm organizing a tournament, should I have the players play G/15 first, then move to G/5, then G/1 + 2? Or should I reverse the order? WHY?