Do the Puja anyway you can,
with devotion and love for Lord in your heart.
God out of His mercy will overlook all the shortcomings of men if they pursue the path of devotion with fervour. At the end of worship, daily or occasional, a prayer is offered to God not to mind the defects while chanting the mantras or adopting the procedures or for forgetting to do some duties out of ignorance. The Almighty is compassionate enough to ignore such errors. Thus, mercy being His chief trait, a devotee need not be concerned with minor defects if his endeavour is absolutely sincere but the enjoined duties should not be abandoned.
yasya smR^ityaa cha naamnoktyaa tapaH puujaa kriyaadishu |
nyuunaM sampuurNataaM yaati sadyo vandey tam.h achyutam.h ||
This shloka will take care of any shortcomings in the puja procedure.
All pujaas are like our birthday parties :-)
 | dhaayna: we first comtemplate whom to invite |
| aahvaahana: we telephone and invite |
| aasana: when they arrive give them place to sit down |
| arghyaM: offer water to wash hands |
| paadyam: offer water to wash feet |
| aachamanam: offer some water(or paanakam) to drink |
| gudopahaara: some thing to eat - light snacks |
| snaanam: take him to bath (you chant shlokas telling the mahimaa of the god/goddess - suuktaas |
| panchamrita: 5 nectars are selected to give bath; as well as waters of various tiirthas and fruit water (phalodaka), water of gold or jewels (hiraNyodaka, ratnodaka) |
| gandha: sandle paste for the body |
| vastrayugmam: two pieces of clothe to wear |
| yajnopaveeta: sacred thread |
| akshata: unbroken decorated rice offered. |
| parimala dravya: scents |
| aabharaNa: ornaments |
| pushpani: flowers |
| maala: garland |
| pratiShThaapana: make him/her sit on the aasana; |
now attend to him further
| anga puujaa: each organ is being thought of and flowers offered to them |
| pushpa puujaa: on each of his/her various names, a veriety of flowers are offered |
| patra puujaa: likewise with leaves of different plants. |
| aShTottara puujaa: 108 names which are very special to the deity are uttered |
| If possible, sahasranaama puuja: 1008 names of the deity |
All these offer you the increased concentration and deeper going into the ONE deity you are worshipping NOW
| dhuupa: agarbatti |
| diipa: light |
| naivedya: offer 5 to 21 variety of preparations |
| hastaprakshalana: wash hands |
| karodvarthana: apply water and gandha to hands |
| paniiya: drinking water |
| phalam or mahaaphalam: fruits (which symbolize all fruits of our actions |
| taambuula: paan for digestion |
| mangala aarati: wishing well and show aarati- asking for light of knowledge |
| pradakshiNaa: for removal of all sins of aeons |
| namaskaaram: total surrender |
| praarthana: prayers (here you say why you called and why you did the puuja) |
| kshamaapana: apoalogies for mistakes |
| braahmaNa suvaasini: represent living deities |
| visarjana puuja: leaving them |
| arghya pradaanam: offering arghya by those who fasted and those who came late or those like ladies of the house who could not participate in the puujas because of other works can now get full merit by offering arghya which is equivalent to whole puuja. |
| Krishnarpanam: Offer all the pujas and their fruits back to the Lord. |
All shlokas basically say what the subtitle means and with lot of various stuti or praise.
The shlokas also treat the deity as all powerful, and often narrate some portion of his/or her story or describe physical or other attributes.