I'll keep this short and sweet so it's easy to understand for all
Max your Personal Stronghold - Decorate the darn house. You don't have to be Martha Stewart, just throw stuff up everywhere you can. Do this in the Free one (Nar Shadda), buy a Dromund Kaas one (it's cheap) and do it there, and if you have a Pub toon, do it to the Coruscant one as well. Even if you don't unlock any other rooms in them, you should get yourself to around %50 Stronghold Bonus. This means if your doing a Conquest Objective that nets you 1000 pts, you'll actually get 1500. Too easy!!!
Conquest Tab/Objectives - Open the conquest tab and look at the Objectives to your left. There you'll find what it is you need to do in order to earn points. Even as a LvL 15 you can max out your conquest and more each week.
Dailies - Do your daily 55HM, 50HM, and Tacticals (EVERY DAY). If you're sub-55 you can still do them!
Group Finder Ops - We must have all hands on deck for GF Ops. GF Ops must be done in an hour or less, and then on to the next one (Alts and other waiting in the wings). The goal here should be 3 or more GF Ops per night.
Crafting - Gather low level crafting mats 2 and 3, to make the lower level War Supplies, and craft throughout the week.