Introduction:
Informal letters are friendly letters that we write to friends and family members on a
   personal basis.
   In addition to giving news, they are often used to give information, congratulate, give
   advice and expressing concern.
   Step by step
   1. Write the address of sender on the right hand
   corner
   Examples:
   Taman Melawati,
   PO Box 221, 99808,
   Tenom, Sabah.
   OR 
   332, Taman Jutaria
   11992, Sarawak. 
   2. Write the date bellow the address
   Example: 23 July 2017
   3. Salutations with the name of the person you are
   writing to
   Examples:
   Dear Maria, Dear Aunt Alice, Dear Mum
   4. Opening
   Useful phrases for the opening
How are you? / How have the family been? / I hope you are well.
Thank you / Many thanks for your (recent/last) letter / postcard.
It was good / nice / great to hear from you again.
I was so surprised to hear that...
I’m sorry I haven’t written / haven't been in touch for such a long time.
It’s ages since I’ve heard from you. I hope you're well / you and your family are well.
How are things? / How are you? / How’s it going?
   5. State the purpose of your writing
   Useful phrases to state the purpose of your writing
    Referring to news
Great news about … Glad to hear that … Sorry to hear about …
    Giving news
Listen, did I tell you about …? You’ll never believe what …
Oh, and another thing … This is just to let you know that …
I thought you might be interested to hear about / know that …
By the way, have you heard about / did you know that …?
    Apologies
I’m writing to apologise for missing your party but I’m afraid I was with flu.
I’m really sorry that I forgot to send you a birthday card but I was busy with my new job.
    Invitations
I’m / We’re having a party on Friday 19th and I / we hope you’ll be able to come.
Would you like to come / go to see ‘Room With a View’ with me at the weekend?
I was wondering if you’d like to go to the theatre / come on holiday with us.
Could you let me / us know if you can come / you’d like to join us?
Thank you very much for your invitation. I’d love to come.
Thank you for asking / inviting me to … but I’m afraid I won’t be able to …
    Requests
I’m writing to ask for your help / you (if you could do me) a favour.
I wonder if / I was wondering if you could help me / do me a favour.
I hope you don’t mind me asking but could you (possibly) …?
I’d be very / really / terribly grateful if you could …
    Thank you / Congratulations / Good Luck
I’m writing to thank you for your hospitality / the wonderful present.
It was so kind of you to invite me to stay with you.
I really appreciated all your help / advice.
Congratulations on passing your exams / your excellent exam results!
I wish you good luck / Good luck in / with your exams / your driving test / your interview.
Don’t worry, I’m sure you’ll do well / pass.
Do be on time, won’t you, and don’t forget to …
    Making suggestions and recommendations
Why don’t you …? / Maybe you could …? / How about …?
You can’t leave New York without (...doing sth)
I’m sure you will enjoy (...doing sth). If you like, we can …
Do visit ... / Don’t forget to ... 
6. Contents/Body
Write in paragraphs. Each paragraph should contain new theme
7. Closing remarks 
Examples:
Give a reason why you're ending the letter: 
Anyway, I must go and get on with my work! / I guess it's time I got on with that studying
I've been avoiding.
Send greetings and/or make reference for future contact: 
Give my love / regards to... / Say hello to... / Anyway, don't forget to let me know the
dates of the party. / I'll try and phone you at the weekend to check the times. / We must
try and meet up soon. / I can't wait to hear from you / Look forward to seeing you again /
Hope to hear from you soon / See you soon / Write soon
8. End of letter
Write you end of letter on right hand corner.
Examples:Yours Sincerely, Yours affectionately(for closer person), Your loving
daughter/son, Your cousin
Make sure to write your name as clear as possible instead of just some random
signature scribble