Sequence of Odysseus' adventures:
1 -  Island of  Ciconians. Odysseus' party sacked the city; got drunk; driven back with casualties.
2 -  Lotus-eaters (Lotophagi) Vegetatively-peaceful community survives by chewing a mind-altering drug. Companions who try it forget about the home and refuse to leave. Odysseus drags them to the ship by force. 
3 -  Island of cyclopes: Polyphemus. One-eyed giant ate a few men in his cave. The rest escape by making him drunk and piercing his eye.
4 -  Island of Aeolus. Sack of winds, Aeolus' gift, untied in view of Ithaca!
5 -  Laestrygonians. Ate some men; crushed all ships but Odysseus'.
6 -  Island of Circe. Men>pigs; Hermes' moly; make love.
7 - Underworld. Elpenor (asks for a funeral); Teiresias; Mother-Anticlea; Women of the past; Agamemnon; Achilles; Ajax; Minos; Tityos, Tantalus; Sisyphus; Heracles. ...
  - Back to Circe; bury Elpenor; Circe gives directions.
8 -  Sirens. Plugs the ears of companions; has himself tied to the mast and enjoys the singing sirens.
9 -  Scylla. Ate 6 men. Pass the whirpool Charybdis.
10 -  Thrinacia: the island of Helios. Ate the holy cows! > Storm; all except Odysseus perished.
11 - Driven back to Charybdis. Grasps a tree branch and hangs on till evening, when the whirpool spits back the broken mast; then grabs it and swims away.
12 -  After 9 days of drift, - Ogygia, the island of Calypso. 7 years stay. In the absence of Poseidon, Athena procures Odysseus' release.
13 - Poseidon returns from Ethiopians: storm crushes Odysseus' raft. Odysseus is saved by Leucothea's veil. Swims for 2 days.
14 -  Phaeacians. Nausicaa; Arethe & Alcinous; Demodocus sings of Troy. (~Magic mariners?..) - Take Odysseus home.
15 - Ithaca at last!  Reveals himself to the swineherd Eumaeus and Telemachus. Redognized by Argus the dog and old nurse Euryclea. Insulting suitors. Poses as a beggar. Penelope - weaving a shroud.
16 - Suitors' contest: bow of Odysseus; 12 axes & rings.  Followed by the slaughter of suitors (+ complacent slaves and slave-girls!)
17 - Reveals himself to Penelope. She recognizes him by  bed-test: common secret: the bed, made by Odysseus' own hands from the tree-trunk, is rooted in the ground.
18 -  Visit to Father-Laertes. Confrontation and reconciliation with the people of Ithaca.
19- More adventures...  To reconcile with Poseidon, Odysseus must carry an oar to the land where people are ignorant of navigation. (He would know when someone asks him, why he carried a shovel.)
20- The end: Later, killed by Telegonus, son from Circe, who had landed on Ithaca in search for the father.  All family departs to the island of Circe, where Odysseus is buried; Telemachus  marries Circe, and Telegonus - Penelope!..