You likely mean the “8 core observances” followed during Paryushan Mahāparva (Śvetāmbara tradition; usually 8 days). Here are the eight simple daily acts most lay Jains focus on:

1) Samayik — sit in equanimity; pause all worldly roles and practice inner peace. 2) Pratikraman — reflect, repent, and ask forgiveness for transgressions. 3) Pratyākhyān/Niyam — take specific vows for restraint (food, speech, travel, etc.). 4) Svādhyāy — study Jain scriptures and listen to pravachans. 5) Tapa — observe austerities as able (Upvās, Ekaśan, Ayambil, etc.). 6) Dān/Sevā — offer food, support to sādhus-sādhvīs and needy beings with non-violence. 7) Kāyotsarga/Dhyān — posture of stillness and meditation to shed karmas. 8) Kṣamāpanā — cultivate universal forgiveness; culminates in Michhami Dukkadam.

Important tradition note:

• Śvetāmbara: Paryushan is 8 days (or 10 in some sub-traditions), centered on Pratikraman, Kalpasūtra readings, and Samvatsarī Kṣamāpanā.
• Digambara: Immediately after Śvetāmbara Paryushan, they observe Daś-Lakṣaṇa Parva for 10 days, each day devoted to one supreme virtue.

If by “8 lakshan” you actually meant the Daś-Lakṣaṇa virtues (which are ten), they are: 1) Uttam Kṣamā, 2) Uttam Mārdav, 3) Uttam Ārjav, 4) Uttam Śauch, 5) Uttam Satya, 6) Uttam Saṁyam, 7) Uttam Tap, 8) Uttam Tyāg, 9) Uttam Akinchan, 10) Uttam Brahmacharya. More on Daś-Lakṣaṇa: • Practical dos during the parva:

Essence: Whether 8-day Paryushan (Śvetāmbara) or 10-day Daś-Lakṣaṇa (Digambara), the goal is the same—self-purification through restraint, study, meditation, austerity, charity, and universal forgiveness.