Collections are your friends, organize the maps you find based on what you think they would be good practice for, and then when you aren't playing random maps and want to focus on an aspect, move to a collection you made. For example, I have a collection for: really large jump aim maps, continuous jump aim maps, fast jump aim maps, low ar jump maps, new age hard-to-read chaotic maps, spaced stream maps, stream stamina maps, burst stream maps, speedy maps, etc. I just go to the category I feel like practicing that day. Of course, it's good to play random maps as well so you can find new maps that challenge you. You can also go to your complete song list and search for things like stars>4 stars<6 bpm>190 etc. (Just keep in mind that those searches don't adjust for DT or HR until you play a song with one of those mods.)