What are the sunnah etiquettes of putting on clothes?

Right side first when dressing

Abu Hurairah reported that the Prophet ﷺ said, "When you put on a garment and when you perform ablution, you should begin with your right side" (Sunan Abi Dawud 4141). In practice, put your right arm into the shirt first, your right leg into the trousers first and your right foot into the shoe first. It takes no extra time once it becomes a habit.

Left side first when undressing

For shoes, the Prophet ﷺ said, "If you want to put on your shoes, put on the right shoe first; and if you want to take them off, take the left one first" (Sahih al-Bukhari 5855). Scholars apply the same logic to other clothes, so you take off the left sleeve or leg first and the right comes last. The right side is honored by being first to be dressed and last to be undressed.

Remembering Allah when you dress

A short Bismillah before dressing is a good habit, and many scholars encourage it, though there is no specific hadith fixing words for everyday dressing. For new clothes there is a clear dua. When the Prophet ﷺ put on something new, he would name it and thank Allah, asking for its good and seeking refuge from its evil (Sunan Abi Dawud 4020). See What dua do I say when getting dressed?

Other simple manners

• Both shoes or none: the Prophet ﷺ said none of you should walk wearing one shoe only (Sahih al-Bukhari 5856).
• Clean and neat: Islam values tidy clothes. Wash them regularly and mend what can be mended, rather than discarding things you can still use.
• Cover your awrah when changing: use a cubicle or a separate room, even in front of family, as far as is practical.
• Wear the right things: avoid gold and real silk as a man, and avoid clothing meant to show off or imitate the opposite sex.
• Dress modestly, not proudly: a nice outfit is good, but pride in it is not.

Clothes should never become a reason for pride, which is also why scholars discuss how long trousers should hang. See Do Muslim men have to wear trousers above the ankles?

How to build the habit

Pick one small thing first, such as putting your right shoe on first, and do it for a week. Then add the left-first rule for taking clothes off, then a quick "Alhamdulillah" when you finish dressing. Small, consistent habits last longer than big resolutions.

Remember that these manners are sunnah, meaning recommended. They earn you reward when you follow them with the intention of copying the Prophet ﷺ, but they never make a prayer or garment invalid.