Lord Krishna asked one of His devotees to ask for any boon and he would grant it. The lady who was a wise person replied "Lord, always keep me in misery so that I will be remembering you all the time".
AGNIHOTRA and DAAN are the material aids to keep you on the right track of spiritual development. You do not have to think anything. Your mind becomes so much reshaped in the direction of Total LOVE and non attachment to worldly matters is automatically generated giving contentment in life. Then comes TAPA i.e. body and mind discipline. Also you have to remember that any Karma you do shall be for self purification. Spreading the knowledge of Healing Vedic Fires is a great good Karma. If you follow intently the Fivefold Path of Vedas i.e. Yajnya, Daan, Tapa, Karma, Swadhyaya automatically you progress on the spiritual path as if lifted by escalator of Grace.