The Transportation Research Board has a nice document for inclinometer use. It contains a short section on data analysis and presentation, including a discussion of typical accuracies and common error types.
http://pubsindex.trb.org/document/view/default.asp?lbid=872704
Transportation Research...
Sometime in the past week or so the Geo-Institute has posted info on the JTFAP document and requested member input. Their deadline is June 15, 2009. AEG also extended their deadline for comments to the same date.
I blogged about these updates at...
Robbo1971 is on the right track. I think you can embed a combo box control within your spreadsheet, but the Data Validation method is much easier and more generally useful.
On Excel 2007 it's under the Data tab, then "Data Validation". I can't remember where it is in earlier versions but not...