diff --git a/log_error.m b/log_error.m
new file mode 100644
index 0000000..0e41095
--- /dev/null
+++ b/log_error.m
@@ -0,0 +1,11 @@
+// log error
+// log error
+//
+// IDECodeSnippetCompletionPrefix: dde
+// IDECodeSnippetCompletionScopes: [CodeBlock]
+// IDECodeSnippetIdentifier: 11BB3538-E850-48CA-AAD7-C60C46CFFD52
+// IDECodeSnippetLanguage: Xcode.SourceCodeLanguage.C
+// IDECodeSnippetUserSnippet: 1
+// IDECodeSnippetVersion: 1
+
+DDLogError(@"%s: error=%@", __FUNCTION__, error.localizedDescription);
diff --git a/log_header.m b/log_header.m
new file mode 100644
index 0000000..fb90f93
--- /dev/null
+++ b/log_header.m
@@ -0,0 +1,17 @@
+// log header
+// log header
+//
+// IDECodeSnippetCompletionPrefix: ddh
+// IDECodeSnippetCompletionScopes: [CodeBlock]
+// IDECodeSnippetIdentifier: 11BB3538-E850-48CA-AAD7-C60C46CFFD51
+// IDECodeSnippetLanguage: Xcode.SourceCodeLanguage.C
+// IDECodeSnippetUserSnippet: 1
+// IDECodeSnippetVersion: 1
+
+#import <CocoaLumberjack/CocoaLumberjack.h>
+
+#ifdef DEBUG
+static const int ddLogLevel = DDLogLevelInfo;
+#else
+static const int ddLogLevel = DDLogLevelError;
+#endif
diff --git a/log_warning.m b/log_warning.m
new file mode 100644
index 0000000..14cebc6
--- /dev/null
+++ b/log_warning.m
@@ -0,0 +1,11 @@
+// log warning
+// log warning
+//
+// IDECodeSnippetCompletionPrefix: ddw
+// IDECodeSnippetCompletionScopes: [CodeBlock]
+// IDECodeSnippetIdentifier: 11BB3538-E850-48CA-AAD7-C60C46CFFD53
+// IDECodeSnippetLanguage: Xcode.SourceCodeLanguage.C
+// IDECodeSnippetUserSnippet: 1
+// IDECodeSnippetVersion: 1
+
+DDLogWarning(@"%s: error=%@", __FUNCTION__, error.localizedDescription);
diff --git a/strong_self.m b/strong_self.m
new file mode 100644
index 0000000..72e7223
--- /dev/null
+++ b/strong_self.m
@@ -0,0 +1,10 @@
+// strong self
+// Strong self reference
+//
+// IDECodeSnippetCompletionPrefix: strongSelf
+// IDECodeSnippetCompletionScopes: [CodeBlock]
+// IDECodeSnippetIdentifier: 717F5611-AC63-43D6-BB9A-4F68F1551103
+// IDECodeSnippetLanguage: Xcode.SourceCodeLanguage.Objective-C
+// IDECodeSnippetUserSnippet: 1
+// IDECodeSnippetVersion: 2
+typeof(weakSelf) strongSelf = weakSelf;