To help the player control their nerves it is useful for them to concentrate on the things they can control rather than focus on the things they cannot control.  Furthermore, the more that situations can be brought under the control of the player, the better they feel.  One useful example of this is to have a checklist to get ready the evening before competition.  The checklist introduces the control needed for preparation and removes fears over forgetting something.  Below is a sample checklist:

Things to leave out to have ready in the morning
Clothes	T-shirt	Main
	Shorts	Main
	Underwear	Main
	Sport socks	Main
	Non badminton trainers	Check
	Tracksuit top	Check
	Tracksuit bottoms	Check
Other	Watch	Check
Things to put in sports bag:
Clothes	T-shirts	Spare 1   Spare 2
	Shorts	Spare 1
	Underwear	Spare 1
	Sport socks	Spare 1
	Badminton Shoes	Check
Equipment	Rackets	Racket 1   Racket 2   Racket 3
	Warm up shuttles	Tube
	Towel	Check
Medical	Inhaler	Check
	Plasters	Check
Food and drink	Water	Bottle 1   Bottle 2   Bottle 3
	Food	Check
Documents	Proof of entry	Check
	Maps to venue	National   Local
	Programme	Check
Other	Money	£10   £2 x 2   £1 x 3   20p x 5   10p x 5
	Mobile phone	Check