To be protected is one of the most basic needs of human nature.
Magickally you can protect yourself either generally or against something specific. Be that magickal attacks, misfortune, accidents, weather, fire etc.
General protections do have the disadvantage of having to look at all possibilities what could happen which lowers their effectiveness, especially when more things come together at once. Specific workings only have to spend their energy on what they were set for and can counter them better. But then, they only guard you against what you created them for.
The workings can be created for protective purposes only, or you can add something to throw it all back to the origin.
If you want something else to be protected too, add that in the statement of intent. If you e.g. just have a protective working for you it can still happen that you have an accident where you come out unharmed but your car can be totally broken.
There's a whole bunch of possibilities you can use to create a protective spell.
Runes and Bindrunes
You can either use one rune alone or a combination of runes, so called bindrunes. The following runes can be put to good use in any protective workings:
If you for example fear a magickal attack, you could create a bindrune of Eihwaz, Algiz and Thurisaz.
The possibilities of using servitors for protective purposes are virtually limitless.
"To protect <target>".
Or you can create one for more specific misfortunes like accidents, bad luck etc, with a SOI like
"To protect <target> from <whatever>"
Also if you create a servitor to protect yourself against magickal attacks, you can add that it should reflect the casting back to its origin. Another possibility would be to create a servitor that draws on itself everything that is cast against you. A nice twist would be to distribute that bad luck/accidents to others.
Create a doll resembling you or the person that should be protected by it. Add some personal objects like hair, finger nails, pieces of clothing, spit etc. Perform a ritual declaring the doll to be your double that will get all the unwanted attention. Place it somewhere save and out of the way ;)
Often it is enough to have a strong aura to deflect possible magickal attacks. Such a strong aura is also useful for other things, like extending it over the whole car or others for protection.
You can create warding glyphs in a similar style as you create sigils. For example you could make a combination of those magick squares and the numerologial alphabet (A = 1, B = 2, C = 3.... I/J = 9... Z = 25).
The Mars square consists of 25 squares (5x5) where they'd fit right in. Of course you can also go for the square of Earth (6x6), Venus (7x7), Mercury (8x8), Moon (9x9), Neptune (10x10), Uranus (11x11) and the Sun (12x12).
Make a statement of intent and form a glyph in the square. Each part of the square represents a number, you only have to connect those from the statement you made.
Enlist the help of entities to protect you. Search for one that would be most appropriate for that task (a god of war wouldn't be that good for protection against simple misfortune) and evoke it. Ask it for it's help. Of course the entity will want something in return, like your worship for a specified time (believe does feed them after all).