Do put the most recent things first. Reverse chronological order for both employment and education. Nobody needs to work forward from your school-leaving certificate to find out what you did last year.
Don't use the word "I". CVs are written in a clipped, subject-less style: "Managed a team of six," not "I managed a team of six." It reads faster and it avoids the sense that the writer is boasting.
Do tailor it. A single CV sent to fifty employers will be a poor fit for forty-nine of them. Read the job advertisement, identify the words it uses for the skills it wants, and make sure those words appear naturally in your document. This is partly about the human reader and partly about applicant-tracking systems.
Don't describe your personality. "Communicative, stress-resistant, responsible, punctual" — every applicant claims these, so they carry no information. If a quality matters, prove it with an achievement. If you can't prove it, leave it out.
Do cut the hobbies unless they earn their place. "Reading, travel, sport" tells an employer you are a human being, which they had assumed. A hobby stays if it demonstrates something relevant — captaining a team, running a club, a serious commitment that shows discipline or leadership — or if it's unusual enough to start a conversation at interview.
Don't leave "References available on request." It's assumed, and the line wastes space that could hold something useful.
Finally, a caution about the rules above: they describe the Anglophone, private-sector norm. Academic CVs run to many pages by design. Civil service applications often have their own forms. And every rule here has been broken by somebody who got the job anyway. The rules exist so that, when you break one, it's a decision rather than an accident.