Concentrate on the meaning of the words of berachos. (ShA)
Don’t throw the beracha from your mouth, rather say it gently with devotion. (MB1)
When mentioning the Holy Name, concentrate on Adnus – the Master of everything. If spelled י-ה-ו-ה you must also concentrate on the lettering – He was, He is, and He will be – at least for krias Shema. (ShA, MB3)
Never pronounce י-ה-ו-ה the way it is spelled. Be careful with the correct pronunciation: אֲ-דֹ-נָ-י and accent the last syllable. (MB2)
When mentioning (any form of) Elokim – concentrate that He is Strong, Master of all Abilities, and Master of All Forces. (ShA)