There are a number of things you can task yourself with doing. No matter what kind of camera or phone-cam you use, trying these out, one per day, will improve your photography. Never stop learning; never stop trying new things!
Manual Exposure mode Aperture Exposure mode Shutter-priority Exposure mode Spot metering mode with compensation Focal lengths and perspective effects Center-weighted with exposure Lock Long tele compression (stacking) Backlighting Monochrome with filter effects Color complements Picture style settings White balance effects Long exposure (motion blur) Really Long exposure (night sky as backlight) Capture texture with low angle light Matrix vs. center-weighted readings Tone Curve control Fill reflector Spotlit shot ISO effects Deep depth of field Shallow depth of field (Focus on the foreground) Super wide-angle lenses (rent) Tilt/shift lens for buildings (buy cheap, or rent) Flash exposure compensation Bracketing and HDR Panoramas (stitching software) Noise and noise filtration Fill flash Multiple flash (buy a cheap slave flash) Shadow as a compositional element Sunsets (yes everybody does them - just do yours) Portraits - individual - natural light Portraits - individual - artificial light Portraits - group - natural light Portraits - group - artificial light Baby pictures Belly pictures Birds Flowers Snow/Mud/Sand/whatever