We are planning a quick trip up to Chicago in the near future and I am debating an IKEA visit. I hadn't trolled the mega store's website in a while and found some pretty cool new pieces that might be worth a detour.
I think the key to shopping at IKEA is to know that it shouldn't ALL come from IKEA. You should be selective and think about what elements you can mix in to elevate a particular item. My big generally rule is to hone in on more accent pieces rather than major staple items as 1.) I would worry about the quality of say a sectional and 2.) their pieces tend to be more on trend and its nice to be able to purchase these types of items without making a huge investment. To further speak to point number 1, I look at items where quality control is maybe not as big of an issue. For example, I probably won't buy a large area rug from IKEA for fear of it shedding all over the place and quickly falling apart. I would (and have) purchase a cowhide as it is obviously a natural material that is pretty much the same whether you buy it for $200 or $1000. To further elaborate on point number 2, I would not plan a space around an IKEA item or if I did I would use it as more of a stand in item while I searched for its replacement. This is because again a nervousness about quality and use but also because I think great spaces are full of items meant to last. You can just sort of feel a richness and depth to a space when it contains pieces that were handcrafted and produced/selected with care.
Take this MELLBY chair for example.