Adding only a possible little to Audiopath's extremely useful suggestions, you might read F. Alton Everest's "Sound Studio Construction on a Budget". You aren't going to have a power saw, alas. If you did, I have DIY designs for Argent Room Lens clones and RPS-style diffusors made out of Styrofoam what I'd be glad to pass on. Mixing diffusion in with absorption is a good idea, and the commercial RGP Skyline diffusors are available from Audio Advisor, maybe for $125 per 2 square foot unit (from a friendly salesman).
Bad room, bad tunes
I recently moved into a cramped apartment, my listening room being 10x11x8. I have a pair a Hales Rev. twos (8" sealed) that have been placed in many spots, but the powerful standing waves persist, and the highs are very fatiguing at louder volumes. The imaging sucks too. Will acoustic room treatment help, or is it just too much speaker for such a small room (thinking of swapping for Merlins or N805s)? Could I get some recommendations on effective, but not too expensive treament? Thank you everyone, it is a dark hour in Ohlala audio.