My list from currently played game (continuing my very first embark).
1. Pause game and take your time to fix all job assignments on Dwarves. No kidding!
2. Cancel all jobs and mark all stockpiles as accepting from links only.
3. Build a well hidden atom smasher. Destroy all sentient bodies ASAP. Engrave some slabs for Dwarves.
4. Fix locations and pastures to proper ones and DO NOT IGNORE PETITIONS. Use steel mechanisms (10k worth) in levers in 3x3 guildhalls.
(start your military squads from wrestling only and throw at first chance leather armor and metal chain mail for armor training)
Like on regular embark:
5. Get farming into shape.
6. Stone hub: get masons, mechanics setup with their hauling and quantum stockpiles. Get some stones.
7. Start construction (or dig) of your favorite embark home. (you need to make living quarters to your standard)
8. Wood hub: Get carpenters, wood furnaces, asheries and lone soap maker up with their wood/bar and quantum stockpiles. Get some wood.
9. Set up crafts workshops between stone hub and wood hub
10. Get butchers going and refuse. Keep bones, but automate totem and such crafting.
11. Then fix kitchen, drinking area, dinners and offices. You need furniture.
12. Cloth industry (you will need some bags!)
13. Forges and smelters. You can upgrade furniture to more expensive clear glass type giving all Dwarves positive mood from sleeping.
14. Automate farming, brewing and milling.
15. Get 9 steel minecarts and 9 steel wheelbarrows and use minimalist lava fetching. Build magma forges and smelters. Get master weapons and armor. Shields last.
16. Build cistern under your underground hospital and pump in some water.
17. Underground mass pit with 10x9 atom smasher. Cage-corridor for invaders.
18. Last is a bug fix for all those annoying bugged water buckets. Add/replace the script in spoiler into region1/raw/objects/reaction_other.txt, which works in every save to allow screw press to empty buckets from water and automate it. The mixed names for reactions are on purpose, to force vanilla game to recognize additional reaction.
[REACTION:MAKE_SOAP_FROM_OIL]
[NAME:empty water bucket]
[BUILDING:SCREW_PRESS:CUSTOM_W]
[REAGENT:water:1:LIQUID_MISC:NONE:WATER:NONE][PRODUCT_DIMENSION:150]
[REAGENT:B:1:NONE:NONE:NONE:NONE]
[CONTAINS:water]
[NOT_IMPROVED]
[PRESERVE_REAGENT]
[DOES_NOT_DETERMINE_PRODUCT_AMOUNT]
[REACTION:EMPTY_BUCKET]
[NAME:make soap from oil]
[BUILDING:SOAP_MAKER:CUSTOM_O]
[REAGENT:lye:150:LIQUID_MISC:NONE:LYE]
[REAGENT:lye container:1:NONE:NONE:NONE:NONE]
[CONTAINS:lye]
[PRESERVE_REAGENT]
[DOES_NOT_DETERMINE_PRODUCT_AMOUNT]
[REAGENT:oil:150:LIQUID_MISC:NONE:NONE:NONE]
[UNROTTEN]
[HAS_MATERIAL_REACTION_PRODUCT:SOAP_MAT]
[REAGENT:oil container:1:NONE:NONE:NONE:NONE]
[CONTAINS:oil]
[PRESERVE_REAGENT]
[DOES_NOT_DETERMINE_PRODUCT_AMOUNT]
[PRODUCT:100:1:BAR:NONE:GET_MATERIAL_FROM_REAGENT:oil:SOAP_MAT]
[PRODUCT_DIMENSION:150]
[SKILL:SOAP_MAKING]
Now everything is automated, well placed and self maintaining.
You can max population, train military, domesticate caverns, conquer FUN! and do mega-projects.
Good luck!