Ihram

Clip nails; remove unwanted hairs
Take a shower (ghusl) for Ihraam. This is a Sunnah.
Put perfume on your body (head, beard, …)
Put Ihraam garments (rida’ & ezar) (رداء و إزار) – (Men only)
Pray two rak’at, or a prescribed salat, if there is  time. 

Arrive at the Meeqat. If you are inside the Haram of Makkah (in your residence in Makkah for example) then you have to go outside the Haram of Makkah to make Ihraam. Tan'eem (or Masjid 'Aisha) is the closest point outside the Haram of Makkah.

Note: Up to this point, everything has been a preparation for Ihraam

Now uncover your head and declare your Intention (Niyah) and read Talbiyah

From this point onwards you are in a state of Ihraam

Niyat

allaahumma innee ureedul umrata fayassirhaalee wataqabbalhaa minnee

"O Allah! I intend to perform Umrah. Please make it easy for me and accept it from me. Amen."

Talbiya

Labbayk, Allahumma Labbayk.
Labbayk. La shareeka laka. Labbayk.
Innal-hamda wan-n'imata
laka wal-mulk.
La shareeka lak.

After this recite Darud Sharif and supplicate to Allah Almighty any du'a in Arabic or in your own language

Restrictions of Ihram 1

Clothing

Men cannot wear any sewn clothes such as a shirt, turban, hooded cloak, trousers, underwear, etc. or shoes. Women can wear their normal clothes, but without covering their faces or hands.

What is forbidden to wear during the state of Ihram is not stitched materials in themselves but those garments that are made to fit the limbs and are usually worn by people in normal state, such as shirts, pants and T-shirts.

Men cannot cover their heads.

Restrictions of Ihram 2

Fragrance

You should not perfume yourself, your clothing, your food or drink after entering Ihram. 
You should also abstain from cleansing yourself with scented soap.

There is no harm in what remains of the effect of perfume used prior to Ihram

Restrictions of Ihram 3

Marriage and Proposals

You shouldn't be wed or make marriage proposals for yourself or others during the state of Ihram.

Hunting

You should not hunt or assist anyone in hunting.
You should not kill animals except those that are harmful or that would attack people, such as mice, snakes and scorpions.