Easy. A rug is one of the easier ways to incorporate pattern into a room. You can always roll it up and toss it if you get tired of it!
Intermediate. I've always loved this fabulous painted door - and it seems like a moderate way to commit to a pattern. Yes, it's paint, but it's also only a door - not too big or too permanent.
Advanced. This room, with it's tiny-print wallpaper and matching screen, takes some commitment - both financial and time (which you know if you've ever removed wallpaper!)
Easy. Back to a low-level of commitment with patterned chairs (easy to swap out) in muted colors.
Intermediate. This Vanessa de Vargas room incorporates a lot of pattern, but since the pieces are movable, the commitment isn't too high.
Advanced. A wall fresco involves a pretty high level of commitment - you're not going to just paint over this art without thinking it through!
Easy. If you're just thinking about incorporating multiple patterns into your space, it makes sense to start with an inspiration board. You'll be able to see if you can live with the controlled chaos of multiple patterns, plus it'll give you a chance to try patterns out before you really commit.
Intermediate. The bathroom is a good place to get your feet wet (ha ha) pattern-wise. It's a small space and you don't spend all your time there, so it won't drive you crazy even if you don't end up liking the combination.
Advanced. The bedroom, on the other and, is a bold place to work with multiple patterns. Be sure the patterns you choose aren't so distracting you won't be able to sleep!
Easy. There are some cool ways to incorporate pattern at the structural level. On the easy side, furniture with artistic patterns incorporated offer a relatively low cost option.
Intermediate. These floors are cool and though they're not particularly easy to pull in and out, they can be covered or refinished.
Advanced. Choosing to live in a building that incorporates pattern into its design is a bold move!