Hakeemul Ummat Hazrat Moulana Shah Ashraf Ali Thanvi ra writes in Qasdus Sabil ila Mawla al-Jalil;

It is essential that individuals traversing the sulook avoid all those things that disturb the tranquility of qalb (mind/heart). This is because the serenity of qalb is a big treasure.

There are many such things. For example:

1. To destroy one’s health by self negligence.
2. To strife for scrumptious food unnecessarily.
3. To indulge all the time in beautification of one’s body and clothes
4. To be either greedy and stingy, or spendthrift
5. To develop (unusually close) friendship or enmity with someone.

Tas-heel Qasdus Sabil, page 30 & 31, by Hazrat Mawlana Shah Lutufe Rasool sahib ra