What do we learn from "b'Chol Es Yihyu Vegadecha Levanim"?
Rashi, based on Shabbos 153a #1: Prepare yourself at all times with good deeds, so if you will die today, you will enter to Shalom. A Mashal for this is a king who invited someone to a feast, but he did not fix a time. If he is smart, immediately he launders his clothing, bathes and anoints, and also tomorrow, until he is called to the meal. His clothing is white, and he is bathed and anointed.
R. Avigdor citing Shabbos 153a #2: Repent one day before your death. One does not know when he will die! Therefore, repent 1 today 2 (every day), lest you die tomorrow. R. Avigdor - your clothes should be white with Divrei Torah
Torah Temimah citing Shabbos 153a #3: This refers to Tzitzis.
Ibn Ezra: Your deeds should not be repulsive. Ralbag - good Midos are compared to word garments, and lowly deeds to dirty garments. Seforno - "Levush Begadim Tzo'im" (Zecharyah 3:3) is filthy with sin.
Rashbam: Your garments should be white and Tahor - conduct with Taharah and cleanliness.
Orchos Tzadikim (Sha'ar ha'Zechirah DH Hine): It is proper to remember Hashem at every moment.
Why does it say "v'Shemen Al Roshecha Al Yechsar"?
Refer to 9:8:1:1.
Torah Temimah citing Shabbos 153a #3: This refers to Tefilin.
R. Avigdor citing Koheles Zuta: This refers to Tzedakah, good deeds, Tzitzis and Tefilin.
Rav Sadya Gaon: This refers to good oil.
Ibn Ezra: This is a good name (reputation; Sha'arei Teshuvah 2:15 - and good deeds). Seforno - be known for investigation and [good] deeds.
Rashbam: Be zealous to anoint your head. People used to anoint with oil.
Ri Kara, Metzudas David: Wear nice garments and anoint with oil to indulge your flesh. One who mourns does not anoint with oil - "Lechem Chamudos Lo Achalti
Seforno: "Shemen Turak Shmecha" (Shir ha'Shirim 1:3). You will give a good scent to all who approach you, when you straighten others - "v'Rabim Heshiv me'Avon", "v'Sorah Yevakshu mi'Pihu" (Mal'achi 2:6-7).
