Reply as soon as possible to a job announcement that interests you, taking into account the criteria mentioned in the advert. You want to attract the employer's interest, and your first contact with them is very important.
If you apply electronically, send a covering letter of one page maximum and a structured CV. Do not send your application from your present employer's e-mail box, from an e-mail address with a nickname or by mass mailing.
Fill out the subject of the e-mail with the title of position, for example, and clearly describe the attachments to the e-mail. Send your CV as an attachment.