diff --git a/src/error.rs b/src/error.rs
index 91cebba..b803bd1 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,9 +1,8 @@
 use trackable::error::{ErrorKind as TrackableErrorKind, TrackableError};
 
 /// This crate specific `Error` type.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, TrackableError)]
 pub struct Error(TrackableError<ErrorKind>);
-derive_traits_for_trackable_error_newtype!(Error, ErrorKind);
 
 /// Possible error kinds.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
diff --git a/src/tags/basic.rs b/src/tags/basic.rs
index 6d0924c..d79208d 100644
--- a/src/tags/basic.rs
+++ b/src/tags/basic.rs
@@ -13,7 +13,7 @@ impl ExtM3u {
     pub(crate) const PREFIX: &'static str = "#EXTM3U";
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V1
     }
 }
@@ -46,12 +46,12 @@ impl ExtXVersion {
     }
 
     /// Returns the protocol compatibility version of the playlist containing this tag.
-    pub fn version(&self) -> ProtocolVersion {
+    pub fn version(self) -> ProtocolVersion {
         self.version
     }
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V1
     }
 }
diff --git a/src/tags/media_or_master_playlist.rs b/src/tags/media_or_master_playlist.rs
index 8dc6a7d..661e6f0 100644
--- a/src/tags/media_or_master_playlist.rs
+++ b/src/tags/media_or_master_playlist.rs
@@ -15,7 +15,7 @@ impl ExtXIndependentSegments {
     pub(crate) const PREFIX: &'static str = "#EXT-X-INDEPENDENT-SEGMENTS";
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V1
     }
 }
diff --git a/src/tags/media_playlist.rs b/src/tags/media_playlist.rs
index d917e99..69ea38c 100644
--- a/src/tags/media_playlist.rs
+++ b/src/tags/media_playlist.rs
@@ -66,12 +66,12 @@ impl ExtXMediaSequence {
     }
 
     /// Returns the sequence number of the first media segment that appears in the associated playlist.
-    pub fn seq_num(&self) -> u64 {
+    pub fn seq_num(self) -> u64 {
         self.seq_num
     }
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V1
     }
 }
@@ -106,12 +106,12 @@ impl ExtXDiscontinuitySequence {
 
     /// Returns the discontinuity sequence number of
     /// the first media segment that appears in the associated playlist.
-    pub fn seq_num(&self) -> u64 {
+    pub fn seq_num(self) -> u64 {
         self.seq_num
     }
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V1
     }
 }
@@ -138,7 +138,7 @@ impl ExtXEndList {
     pub(crate) const PREFIX: &'static str = "#EXT-X-ENDLIST";
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V1
     }
 }
@@ -171,12 +171,12 @@ impl ExtXPlaylistType {
     }
 
     /// Returns the type of the associated media playlist.
-    pub fn playlist_type(&self) -> PlaylistType {
+    pub fn playlist_type(self) -> PlaylistType {
         self.playlist_type
     }
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V1
     }
 }
@@ -203,7 +203,7 @@ impl ExtXIFramesOnly {
     pub(crate) const PREFIX: &'static str = "#EXT-X-I-FRAMES-ONLY";
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V4
     }
 }
diff --git a/src/tags/media_segment.rs b/src/tags/media_segment.rs
index d505f01..32b7fb6 100644
--- a/src/tags/media_segment.rs
+++ b/src/tags/media_segment.rs
@@ -137,7 +137,7 @@ impl ExtXDiscontinuity {
     pub(crate) const PREFIX: &'static str = "#EXT-X-DISCONTINUITY";
 
     /// Returns the protocol compatibility version that this tag requires.
-    pub fn requires_version(&self) -> ProtocolVersion {
+    pub fn requires_version(self) -> ProtocolVersion {
         ProtocolVersion::V1
     }
 }
diff --git a/src/types.rs b/src/types.rs
index cf24cfb..0bf8cc6 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -150,11 +150,11 @@ impl DecimalFloatingPoint {
     }
 
     /// Converts `DecimalFloatingPoint` to `f64`.
-    pub fn as_f64(&self) -> f64 {
+    pub fn as_f64(self) -> f64 {
         self.0
     }
 
-    pub(crate) fn to_duration(&self) -> Duration {
+    pub(crate) fn to_duration(self) -> Duration {
         let secs = self.0 as u64;
         let nanos = (self.0.fract() * 1_000_000_000.0) as u32;
         Duration::new(secs, nanos)
@@ -209,7 +209,7 @@ impl SignedDecimalFloatingPoint {
     }
 
     /// Converts `DecimalFloatingPoint` to `f64`.
-    pub fn as_f64(&self) -> f64 {
+    pub fn as_f64(self) -> f64 {
         self.0
     }
 }