diff --git a/src/db_operations.rs b/src/db_operations.rs
index 504e830..b4207d8 100644
--- a/src/db_operations.rs
+++ b/src/db_operations.rs
@@ -16,14 +16,14 @@ pub struct DatabaseRequest {
 }
 
 impl SearchType {
-    pub fn is_where(self: &Self) -> bool {
+    pub fn is_where(&self) -> bool {
         match self {
             SearchType::Where => true,
             SearchType::Like => false,
         }
     }
 
-    pub fn is_like(self: &Self) -> bool {
+    pub fn is_like(&self) -> bool {
         match self {
             SearchType::Where => false,
             SearchType::Like => true,
@@ -111,7 +111,7 @@ impl DBObject {
         Ok(DBObject { conn })
     }
 
-    pub fn save_tag(self: &Self, tag: &ItemTag) -> Result<(), DatabaseCreationError> {
+    pub fn save_tag(&self, tag: &ItemTag) -> Result<(), DatabaseCreationError> {
         self.conn.execute(
             "INSERT OR IGNORE INTO musicinfo (path, title, artist, album, album_artist) VALUES ( ?1, ?2, ?3, ?4, ?5 )",
             params![tag.path, tag.title, tag.artist, tag.album, tag.album_artist],
@@ -122,7 +122,7 @@ impl DBObject {
     /// Returns a vector of ItemTags that fulfil the requested query
     ///
     pub fn get(
-        self: &Self,
+        &self,
         request: &DatabaseRequest,
     ) -> Result<Option<Vec<ItemTag>>, rusqlite::Error> {
         assert!(!request.search_tag.is_empty(), "There must be at least one field filled in the PartialItem. Use `get_all()` if you want the full table");
diff --git a/src/message_types.rs b/src/message_types.rs
index a9d7d9c..cda13ed 100644
--- a/src/message_types.rs
+++ b/src/message_types.rs
@@ -44,27 +44,27 @@ impl Default for PartialTag {
 }
 
 impl PartialTag {
-    pub fn has_path(self: &Self) -> bool {
+    pub fn has_path(&self) -> bool {
         self.path.is_some()
     }
 
-    pub fn has_title(self: &Self) -> bool {
+    pub fn has_title(&self) -> bool {
         self.title.is_some()
     }
 
-    pub fn has_artist(self: &Self) -> bool {
+    pub fn has_artist(&self) -> bool {
         self.artist.is_some()
     }
 
-    pub fn has_album(self: &Self) -> bool {
+    pub fn has_album(&self) -> bool {
         self.album.is_some()
     }
 
-    pub fn has_album_artist(self: &Self) -> bool {
+    pub fn has_album_artist(&self) -> bool {
         self.album_artist.is_some()
     }
 
-    pub fn is_empty(self: &Self) -> bool {
+    pub fn is_empty(&self) -> bool {
         return self.path.is_none()
             && self.title.is_none()
             && self.artist.is_none()
diff --git a/src/music_player.rs b/src/music_player.rs
index a691d5e..6097aff 100644
--- a/src/music_player.rs
+++ b/src/music_player.rs
@@ -36,17 +36,17 @@ impl<'a> MusicPlayer<'a> {
         return mp;
     }
 
-    pub fn pause(self: &Self) -> () {
+    pub fn pause(&self) {
         self.playing_sink.pause();
     }
 
-    pub fn play(self: &Self) -> () {
+    pub fn play(&self) {
         self.playing_sink.play();
         println!("playing");
     }
 
     // TODO: set these to return results
-    pub fn change_now_playing(self: &mut Self, item: ItemTag) -> Result<(), MusicPlayerError> {
+    pub fn change_now_playing(&mut self, item: ItemTag) -> Result<(), MusicPlayerError> {
         println!("\n\n switching now playing to: {}", item.path.clone());
         let file = File::open(item.path.clone());