putting together your portofolio

Hello i am currently in the process of setting myself up to begin my investing venture. i am just wondering what is it that you more experienced investors put in your protofolios. for example a couple of the things i am putting together are let say

  1. property selection grid
    2.property profile.
    3.inspection checklist.
    4.market analysis.
  2. annual property operating data.
  3. a list of all my loan and grant sources.
  4. a check list of question i may want to ask for different propertis
  5. purchase contracts.
    so anyway i am just wondering if i am missing something or if you guys just have any advice before i mak emy first offer please.

also one quick question when making an offer is there a standard form for an offer or is just a letter or a phone call where i just offer a price on the property.