Usually when I see lists of things to do to be more energy efficient, they require one to own their own home. What can I do to be more energy efficient in an apartment? 
For example, I can't install solar panels, I can't upgrade/change my appliances, I can't install better insulation or windows, and I can't install a programmable thermostat. 
Pretty much the only thing I can do (and have done) is switch all of my bulbs to CFLs. I also keep all of my electronics on power strips which I turn off when I leave my apartment and when I'm sleeping.
Are there any other things I can do to reduce my energy consumption?
Any little things that can add up? Thanks!
There are indeed several steps you can take to be more energy efficient in an apartment, even if you don't have complete control over the building's infrastructure. Here are some things you can do:
1. Seal air leaks: Ask your landlord if you can seal any air leaks around doors, windows, and electrical outlets.
What are some other things I can do that don't require any major changes to the apartment or purchasing expensive items? 
I'm not terribly concerned about the cost, just looking for ways to be as energy efficient as possible. 
Thanks for the help!
There are several energy-saving measures you can take in an apartment that don't require major renovations or investments in new appliances or fixtures:
1. Use energy-efficient lighting: